The sin of Lot’s wife was looking back. Her heart was still in Sodom and Gomorra. The believer’s heart is to always be looking to Christ, always pressing forward toward the mark; and Christ is that mark we press forward to (Philippians 3:14). We do not look with desire to go back as the children of Israel did so many times when trouble came. But we keep moving forward till we reach home. “And the LORD said unto Moses, Wherefore criest thou unto me? speak unto the children of Israel, that they go forward” (Exodus 14:15).