“ ‘Obey my laws. You must not mate two different kinds of cattle or sow your field with two different kinds of seed. You must not wear clothing made from two different kinds of material mixed together.
“No one can serve two masters. The person will hate one master and love the other, or will follow one master and refuse to follow the other. You cannot serve both God and worldly riches.
“No one sews a patch of unshrunk cloth over a hole in an old coat. If he does, the patch will shrink and pull away from the coat, making the hole worse.
And if he chose them by grace, it is not for the things they have done. If they could be made God’s people by what they did, God’s gift of grace would not really be a gift.
This is what we are proud of, and I can say it with a clear conscience: In everything we have done in the world, and especially with you, we have had an honest and sincere heart from God. We did this by God’s grace, not by the kind of wisdom the world has.