The dictionary says "blessed" means sanctification, consecrated, divine favor, and bestowed with goodness.
"Blessed" in the context of the sermon on the mount means to be supremely happy.
Happiness is not just about mood, it's about feeling at peace, grounded, content, and complete, weathering the difficult times as well as the good times.
Greek: makarios = "happy isles".
Being blessed involves :
Meditating on God's law.
1 Blessed is the man
who does not walk in the counsel of the wicked
or stand in the way of sinners
or sit in the seat of mockers.
2 But his delight is in the law of the LORD,
and on his law he meditates day and night.
3 He is like a tree planted by streams of water,
which yields its fruit in season
and whose leaf does not wither.
Whatever he does prospers.
It involves having faith.
1Therefore, since we have been justified through faith, we have peace with God through our Lord Jesus Christ, 2 through whom we have gained access by faith into this grace in which we now stand. And we rejoice in the hope of the glory of God. 3 Not only so, but we also rejoice in our sufferings, because we know that suffering produces perseverance; 4 perseverance, character; and character, hope. 5And hope does not disappoint us, because God has poured out his love into our hearts by the Holy Spirit, whom he has given us.
It involves trusting in God.
1"Do not let your hearts be troubled. Trust in God; trust also in me. 2 In my Father's house are many rooms; if it were not so, I would have told you. I am going there to prepare a place for you. 3 And if I go and prepare a place for you, I will come back and take you to be with me that you also may be where I am. 4You know the way to the place where I am going."
37No, in all these things we are more than conquerors through him who loved us. 38For I am convinced that neither death nor life, neither angels nor demons,neither the present nor the future, nor any powers, 39neither height nor depth, nor anything else in all creation, will be able to separate us from the love of God that is in Christ Jesus our Lord.
23 I know, O LORD, that a man's life is not his own;
it is not for man to direct his steps.
24 Correct me, LORD, but only with justice—
not in your anger,
lest you reduce me to nothing.
It involves repentance, turning from sinful ways.
11In the same way, count yourselves dead to sin but alive to God in Christ Jesus. 12Therefore do not let sin reign in your mortal body so that you obey its evil desires. 13Do not offer the parts of your body to sin, as instruments of wickedness, but rather offer yourselves to God, as those who have been brought from death to life; and offer the parts of your body to him as instruments of righteousness. 14For sin shall not be your master, because you are not under law, but under grace.
24What a wretched man I am! Who will rescue me from this body of death? 25Thanks be to God—through Jesus Christ our Lord!
So then, I myself in my mind am a slave to God's law, but in the sinful nature a slave to the law of sin.
"Blessed are the poor in spirit" Matthew 5:3
Poor in spirit means humble, one who does not trust in the world or himself, but in God's grace. Because he trusts nothing in the world, and trusts in God, he is blessed.
6 This poor man called, and the LORD heard him;
he saved him out of all his troubles.
My whole being will exclaim,
"Who is like you, O LORD ?
You rescue the poor from those too strong for them,
the poor and needy from those who rob them."
3 But may the righteous be glad
and rejoice before God;
may they be happy and joyful.
4 Sing to God, sing praise to his name,
extol him who rides on the clouds
his name is the LORD—
and rejoice before him.
5 A father to the fatherless, a defender of widows,
is God in his holy dwelling.
6 God sets the lonely in families,
he leads forth the prisoners with singing;
but the rebellious live in a sun-scorched land.
35 You are awesome, O God, in your sanctuary;
the God of Israel gives power and strength to his people.
Praise be to God!
Psalm 107: 41-43
41 But he lifted the needy out of their affliction
and increased their families like flocks.
42 The upright see and rejoice,
but all the wicked shut their mouths.
43 Whoever is wise, let him heed these things
and consider the great love of the LORD.
7 "Let us go to his dwelling place;
let us worship at his footstool-
8 arise, O LORD, and come to your resting place,
you and the ark of your might.
9 May your priests be clothed with righteousness;
may your saints sing for joy."
Being faithful to God and turning away from the world is not easy. This all needs to take place from within. It is not about being physically poor, but to not put your faith in your possessions.
22Then Jesus said to his disciples: "Therefore I tell you, do not worry about your life, what you will eat; or about your body, what you will wear. 23Life is more than food, and the body more than clothes. 24Consider the ravens: They do not sow or reap, they have no storeroom or barn; yet God feeds them. And how much more valuable you are than birds! 25Who of you by worrying can add a single hour to his life[b]? 26Since you cannot do this very little thing, why do you worry about the rest?
27"Consider how the lilies grow. They do not labor or spin. Yet I tell you, not even Solomon in all his splendor was dressed like one of these. 28If that is how God clothes the grass of the field, which is here today, and tomorrow is thrown into the fire, how much more will he clothe you, O you of little faith! 29And do not set your heart on what you will eat or drink; do not worry about it. 30For the pagan world runs after all such things, and your Father knows that you need them. 31But seek his kingdom, and these things will be given to you as well.
32"Do not be afraid, little flock, for your Father has been pleased to give you the kingdom. 33Sell your possessions and give to the poor. Provide purses for yourselves that will not wear out, a treasure in heaven that will not be exhausted, where no thief comes near and no moth destroys. 34For where your treasure is, there your heart will be also.
1 John 4:4-6
4You, dear children, are from God and have overcome them, because the one who is in you is greater than the one who is in the world. 5They are from the world and therefore speak from the viewpoint of the world, and the world listens to them. 6We are from God, and whoever knows God listens to us; but whoever is not from God does not listen to us. This is how we recognize the Spirit[a] of truth and the spirit of falsehood.
This support comes from other brethren, as well.
1 John 4:7-21
7Dear friends, let us love one another, for love comes from God. Everyone who loves has been born of God and knows God. 8Whoever does not love does not know God, because God is love. 9This is how God showed his love among us: He sent his one and only Son[b] into the world that we might live through him. 10This is love: not that we loved God, but that he loved us and sent his Son as an atoning sacrifice for[c] our sins. 11Dear friends, since God so loved us, we also ought to love one another. 12No one has ever seen God; but if we love one another, God lives in us and his love is made complete in us.
13We know that we live in him and he in us, because he has given us of his Spirit. 14And we have seen and testify that the Father has sent his Son to be the Savior of the world. 15If anyone acknowledges that Jesus is the Son of God, God lives in him and he in God. 16And so we know and rely on the love God has for us.
God is love. Whoever lives in love lives in God, and God in him. 17In this way, love is made complete among us so that we will have confidence on the day of judgment, because in this world we are like him. 18There is no fear in love. But perfect love drives out fear, because fear has to do with punishment. The one who fears is not made perfect in love.
19We love because he first loved us. 20If anyone says, "I love God," yet hates his brother, he is a liar. For anyone who does not love his brother, whom he has seen, cannot love God, whom he has not seen. 21And he has given us this command: Whoever loves God must also love his brother.
Faith is the victory that overcomes the world.
1 John 5:1-5
1Everyone who believes that Jesus is the Christ is born of God, and everyone who loves the father loves his child as well. 2This is how we know that we love the children of God: by loving God and carrying out his commands. 3This is love for God: to obey his commands. And his commands are not burdensome, 4for everyone born of God overcomes the world. This is the victory that has overcome the world, even our faith. 5Who is it that overcomes the world? Only he who believes that Jesus is the Son of God.