Pour water in a cup. Drink the water. Pour more water into the cup. Drink the water. You are the cup. The water is everything that God wants you to have, including strength. As long as you refill from God's supply, you will never be empty, and it will always be good. Get your fill from man, and it may feel good, sound good and smell good; but could be very bad for you long-term. Consider the source.
Isaiah 40:28–31; Psalms 103:25–28; Isaiah 51:6; Genesis 37:25–28; 2 Corinthians 12:9; Psalms 27:13–14