Religion and faith are deeply paradoxical. They hold to exclusive truths simultaneously, as with Calvin:
From John Calvin's Institutes, 1.2:
"… [The Christian] embraces him [God] not less as the avenger of wickedness than as the rewarder of the righteous; because he perceives that it equally appertains to his glory to store up punishment for the one, and the eternal life for the other.… Such is pure and genuine religion, namely, confidence in God coupled with serious fear …"