Norman Vincent Peal
How to have constant energy

"Of course many people are tired simply because they are not interested in anything. Nothing ever moves them deeply. To some people it makes no difference what's going on or how things go. Their personal concerns are superior even to all crises in human history. Nothing makes any real difference to them except their own little worries, their desires, and their hates. They wear themselves out stewing around about a lot of inconsequential things that amount to nothing. So they become tired. They even become sick. The surest way not to become tired is to lose yourself in something in which you have a profound conviction."

Compiled by Thomas George