God, as the One who actively sustains all things (see again Heb. 1:3 with Col 1:17), was the source of their being. But they, as Adam’s descendants, were the sole source of their sin. Their sinful inclinations made them the authors of their own sin. And, consequently, they did evil while God did not, for while God sustained them in their sin, He was not its source. This is why Scripture states that God creates, sends, permits, and even moves other to do evil while never doing evil Himself. He creates and sustains sinful persons without Himself being the source of their sin.
Suffering and the Sovereignty of God (2006, p. 67)