Energy is a major ingredient for success. Respect your body. Listen to it. When fatigue walks in, faith walks out.
A well known doctor, famous for treating depression patients, said he had never had a depressed patient who was really physically fit. What you spend your time on is what you truly respect.
“And ye shall serve the Lord your God, and he shall bless thy bread, and thy water; and I will take sickness away from the midst of thee.”