The whole Trinity appeared: the Father in the voice; the Son in the man; the Spirit in the shining cloud.

-- St. Thomas Aquinas, STh III

God [the Son] did not impede death from separating his soul from his body according to the necessary order of nature, but has reunited them to one another in the Resurrection, so that he himself might be, in his person, the meeting point for death and life, by arresting in himself the decomposition of nature produced by death and so becoming the source of reunion for the separated parts.

-- St. Gregory of Nyssa

God fashioned man with his own hands [that is, the Son and the Holy Spirit] and impressed his own form on the flesh he had fashioned, in such a way that even what was visible might bear the divine form.

-- St. Irenaeus

This one, true God, of his own goodness and "almighty power", not for increasing his own beatitude, nor for attaining his perfection, but in order to manifest this perfection through the benefits which he bestows on creatures, with absolute freedom of counsel "and from the beginning of time, made out of nothing both orders of creatures, the spiritual and the corporeal. . ."

-- Dei Filius

Although set by God in a state of rectitude man, enticed by the evil one, abused his freedom at the very start of history. He lifted himself up against God, and sought to attain his goal apart from him.

-- Gaudium et spes 13

By the unity of the divine nature, which remains present in each of the two components of man, these are reunited. For as death is produced by the separation of the human components, so Resurrection is achieved by the union of the two.

-- St. Gregory of Nyssa

The Father of mercies willed that the Incarnation should be preceded by assent on the part of the predestined mother, so that just as a woman had a share in the coming of death, so also should a woman contribute to the coming of life.

-- Lumen Gentium