Blessed are the poor in spirit, for theirs is the kingdom of heaven. Blessed are they who mourn, for they will be comforted. Blessed are they who hunger and thirst for righteousness, for they will be satisfied. Blessed are the merciful, for they will be shown mercy. Blessed are the clean of heart for the will see God. Blessed are the peacemakers, for they will be called the children of God.
This passage is known as Jesus' "Sermon on the Mount," and is the longest segment of teaching by Jesus in the New (or Greek) Testament.