9 But do not so conceive of these precepts and rewards, as to think when you hear, “Blessed are the pure in heart, for they shall see God,” that the poor in spirit, or the meek, or they that mourn, or they who hunger and thirst after righteousness, or the merciful, will not see Him. Think not of those that are pure in heart, that they only will see Him, while the others will be excluded from the sight of Him. For all these several characters are the self-same persons.
They shall all see; but they shall not see in that they are poor in spirit, or meek, or in that they mourn, and hunger and thirst after righteousness, or are merciful, but in that they are pure in heart. Just as if bodily works were duly assigned to the several members of the body, and one were to say for example, Blessed are they who have feet, for they shall walk; blessed are they that have hands, for they shall work; blessed are they that have a voice, for they shall cry aloud; blessed are they who have a mouth and tongue, for they shall speak; blessed are they that have eyes, for they shall see.
Even so our Lord arranging in their order the members as it were of the soul, has taught what is proper to each. Humility qualifies for the possession of the kingdom of heaven; meekness qualifies for possessing the earth; mourning for consolation; hunger and thirst after righteousness for being filled; mercy for the obtaining mercy; a pure heart for seeing God.
Source: Sermons on Selected Lessons of the New Testament (New Advent)