Where do temptations and trials come from?

Temptations do not come from God, as St James explains: “Let no one say when he is tempted, ‘I am tempted by God’; for God cannot be tempted with evil, and he himself tempts no one. But each person is tempted when he is lured and enticed by his own desire; then desire, when it has conceived, gives birth to sin; and sin, when it is full grown, results in death” (Jas 1:13–15; see Q431).

Temptation can come from our flesh, from the world and other people, and from the devil.