Condition of soul has much to do with warring the good warfare. Faith must be kept up, bright and simple and exercised, the eyes of the heart ever on the things unseen and eternal. Withal a good conscience is imperative, for if faith brings God in, a good conscience judges self so as to keep sin out. This, of all moment for every Christian, is preeminently needful for him who is devoted to the service of Christ. There is nothing which so hardens the heart as the continual giving out of truth apart from one's own communion and walk. [16]