I don't believe anybody can really grasp everything that's even in one textbook.

As soon as you go into any biological process in any real detail, you discover it's open-ended in terms of what needs to be found out about it.

My ambitions were already very clearly fixed by the time I was 6 or 7.

When I was in high school, I became interested in cytochemistry: chemical analysis under the microscope, and trying to understand the composition of cells.

Try hard to find out what you're good at and what your passions are, and where the two converge, and build your life around that.

I don't believe anybody can really grasp everything that's even in one textbook.

Everybody has to learn for the first time.