Energy is a very good thing because it helps one to execute work and too much energy is even better because it helps one to execute more work . However energy is great if is just enough to sustain a humain being. when old man advice about too much energy 1. be careful of having too much energy it keeps you awake at night and it give you nightmares. 2. You believe too much in yourself 3. undisired cell in your body also get more energized and drive you towards your grave next time you see old man next to you, knw that they have used more energy and they are now left with just enough to sustain themselves, learn from them, respect them and moreover take care of them and you will as well grow grey hair
