If you have fear of some pain or suffering, you should examine whether there is anything you can do about it. If you can, there is no need to worry about it; if you cannot do anything, then there is also no need to worry.
The man who had died looked nakedly on life, and saw a vast resoluteness everywhere flinging itself up in stormy or subtle wave-crests.... always the man who had died saw not the bird alone, but the short, sharp wave of life of which the bird was the crest.
Man is a mystery. It needs to be unravelled, and if you spend your whole life unravelling it, don't say that you've wasted time. I am studying that mystery because I want to be a human being.