God created the possibility of evil; people actualized that potentiality. The source of evil is not God's power but mankind's freedom. Even an all-powerful God could not have created a world in which people had genuine freedom and yet there was no potentiality for sin, because our freedom includes the possibility of sin within its own meaning.
Peter KreeftIf we rely on anything else besides faith to maintain the practice of the presence of God, we will certainly fail, whether this is our feelings, or experiences, or sincerity, or good intentions, or reasonings, or plans. The reason these things will fail while faith will not fail is that all these things depend on us, while faith depends on God. It is a gift of God.
Peter KreeftEvery blade of grass is a blade of grace, a grace note in God's single Song. Nature is not blind and dumb. Nature is eloquent. Human science is blind and dumb if it does not hear this eloquence.
Peter Kreeft