The Beatitudes are a summary of teachings which Jesus continually gave to his disciples. Jesus demonstrated the Beatitudes by the character portrayed in his own life. He showed the world a living faith, fill with virtue and love.
Matthew 5:3 poor in spirit means that one has found sufficiency to be in the grace of God. The man who is poor in spirit will not boast of his talents or attainments, because he knows he has nothing that he did not receive from God. He is willing to confess his emptiness because he realizes that in his self there is no power. Elijah found that it was the lack that set up conditions so that God could act, I Kings 17:12, 1-16. The Laodiceans church felt that they were rich and had no need of nothing. They could not see their spiritual need, Rev. 3:17-18.
Matthew 5:5 speaks of the virtue meekness. Meekness is a disciplined life, Ps. 25:9, a life subject to daily conditioning as a result of being guided and taught by the Holy Spirit. The meek knows how wait upon the Lord, Ps.37:8-11. God will fight for him because he has surrendered everything to God.
Blessed are they which do hunger and thirst after righteousness: for they shall be filled, Matt. 5:6. We spend our money for that which is not bread and our labour for that which satisfieth not, Isa. 55:1-7. You are powerless to give food to a child unless he is hungry for it, Luke 1:53, 46-55. We cannot have what we do not truly hunger for. To hunger is a sign of life, dead men need no food, crave no water. We should desire to be like the river whose power is not produced or contained in and of its self; its power flows through it from the ocean, John 7:37-39. Water will purify and sanctify a vessel as long as it is being poured in.
Matt. 5:9 blessed are the peacemakers: for they shall be called the children of God. Peace is the work of justice and of forgiveness. A man can be peaceable and a great lover of peace and still fail to be a peace-maker. The work of peace is by the labor of faith and love, being prepared to give everything in toil and sacrifice to make peace. The blood of the cross is the price Jesus paid that we might partake of grace and peace, Rev.1:4-6.