If anyone does not believe that Holy Mary is the Mother of God, such a one is a stranger to the Godhead.
Gregory of NazianzusThere is One God and One Mediator between God and man, the man Jesus Christ (cf. I Tim. 2:5). For He still pleads even now as man for my salvation; for He continues to wear the Body which He assumed, until He make me a god by the power of His Incarnation; although He is no longer known after the flesh (cf. II Cor. 5:16) ? I mean, the passions of the flesh, the same, except sin, as ours.
Gregory of NazianzusLet us not esteem worldly prosperity or adversity as things real or of any moment, but let us live elsewhere, and raise all our attention to Heaven; esteeming sin as the only true evil, and nothing truly good, but virtue which unites us to God.
Gregory of NazianzusWho gave you the ability to contemplate the beauty of the skies, the course of the sun, the round moon, the millions of stars, the harmony and rhythm that issue from the world as from a lyre, the return of the seasons, the alternation of the months, the demarcation of day and night, the fruits of the earth, the vastness of the air, the ceaseless motion of the waves, the sound of the wind?
Gregory of NazianzusNo one seeing a beautifully elaborated lyre with its harmonious, orderly arrangement, and hearing the lyre's music will fail to form a notion of its craftsman-player, to recur to him in thought though ignorant of him by sight. In this way the creative power, which moves and safeguards its objects, is clear to us, though it be not grasped by the understanding. Anyone who refuses to progress this far in following instinctive proofs must be wanting in judgment. But still, whatever we imagined or figured to ourselves or reason delineated is not the reality of God.
Gregory of Nazianzus