Beware of hindering yourselves with any weight of earthly cares. Examine your hearts most closely, and purge out each besetting sin with a godly prayerful jealousy. Remember that blessed rule, "looking unto Jesus." Peter did run well for a time, when he left the ship to walk upon the sea to Jesus—but when he saw the waves and the storm he was afraid and began to sink. Thus many a one sets out courageously—but after a while corruptions rise high within, corruptions are strong without, the eye is drawn off Jesus, the devil gets an advantage—and the soul begins to sink. Oh, keep your eye steadily fixed on Christ, and you shall go through fire and water and they shall not hurt you.
~ J.C. Ryle