St. Athanasius on Creation Before the Cross

Athanasius wrote,

Even the very creation broke silence at His behest and, marvelous to relate, confessed with one voice before the cross, that monument of victory, that He Who suffered thereon in the body was not man only, but Son of God and Savior of all. The sun veiled his face, the earth quaked, the mountains were rent asunder, all men were stricken with awe. These things showed that Christ on the cross was God, and that all creation was His slave and was bearing witness by its fear to the presence of its Master.

On the Incarnation, ch. 4.