Arthur W. Pink, in his commentary on the Sermon on the Mount, writes, "Poverty of spirit may be termed the negative side of faith" (p. 17). Similarly, Charles H. Spurgeon, a Protestant preacher of the nineteenth century, comments, "The way to rise in the kingdom is to sink in ourselves" (The Gospel of the Kingdom, p. 21). It is this realization of our utter unworthiness, a sense of spiritual need and destitution, that drives us to seek Christ to lift it. The economically poor gravitate to where they can have their needs met. Recognizing one's spiritual poverty parallels this, motivating us to seek to have that need supplied through a relationship with God. Poor in spirit, therefore, describes a fundamental trait found in every son of God who earnestly seeks Him.
Jesus says in Matthew 11:29, "Take My yoke upon you and learn from Me, for I am gentle and lowly in heart, and you will find rest for your souls." This is how to cultivate this God-honoring attitude. We must do this because, while merely feeling lowly before God is insufficient, it nevertheless opens the doors to the awesome beneficence only God can give and indeed yearns to give. He says in Isaiah 66:2: "'For all these things [in creation] My hand has made, and all those things exist,' says the LORD. 'But on this one will I look: on him who is poor and of a contrite spirit, and who trembles at My word.'"
Poor in spirit is one thing, contrition is another, and humility is yet a third quality. They are all related, but they are not specifically the same attitude. To be contrite is to be sorry or remorseful because of guilt, equating to "Blessed are those who mourn" in Matthew 5:4. Humility is more active than either of the other two, involving consciously choosing submission in obedience. It equates more with "Blessed are the meek" in Matthew 5:5. Poverty of spirit, then, precedes contrition, remorse, humility, and meekness because it is a major factor involved in producing them.