Some day I'd like to go scuba diving. The people I know who practice the sport say it is wonderful.
Scuba diving is safe - provided you don't try to dive too deep or stay down too long. You don't want to run out of oxygen. And when you surface, you've got to do so slowly, making periodic decompression stops at various levels. The longer you stay down, the slower you have to surface. This gives your body time to acclimate to the change in pressure.
Life is a lot like scuba diving. We need to learn to pace ourselves lest we run out of gas. The harder we work, the more important it is to chill out - to decompress from the stresses we have been under.