But there is nothing in biology yet found that indicates the inevitability of death.

All we know so far is what doesn't work.

I don't feel frightened by not knowing things, by being lost in the mysterious universe without any purpose - which is the way it really is, as far as I can tell. Possibly. It doesn't frighten me.

From a long view of the history of mankind, seen from, say, ten thousand years from now, there can be little doubt that the most significant event of the 19th century will be judged as Maxwell's discovery of the laws of electrodynamics. The American Civil War will pale into provincial insignificance in comparison with this important scientific event of the same decade.

Work as hard and as much as you want to on the things you like to do the best.

No one really understands quantum mechanics.

The real problem in speech is not precise language. The problem is clear language.