sinning against our conscience

Let us stick to truth and righteousness. By God's grace let us imitate our Lord and Master, in whose mouth no deceit was ever found. Let us not be afraid of being poor, nor of being treated with contempt. Never, on any account whatever, let us do that which our conscience cannot justify. If we lose inward peace, we lose more than a fortune can buy. If we keep in the Lord's own way and never sin against our conscience, our way is sure against all comers. Who is he that can harm us if we be followers of that which is good? We may be thought fools by fools if we are firm in our integrity; but in the place where judgment is infallible we shall be approved. - C.H. Spurgeon