The whole aim of comparative anatomy is to discover what structures are homologous.

Is it not beautiful to discover a new path to your destiny and decorate it with the beauty of your imagination?

Renown is a source of toil and sorrow obscurity is a source of happiness.

Father or stepfather - those are just titles to me. They don't mean anything.

Praise them for what they do well, both privately and publicly.

It is one thing to persuade, another to command; one thing to press with arguments, another with penalties.

One forgets that one is one. I must try to remember this.

Postponing doing the really interesting things in life for later, when you don't have the energy.

I do not know if I am mistaken, but it seems that one can obtain more truths, important to Humanity, from Chemistry than from any other Science.

Surprise and delight and connection are remarkable.

It's like many other things in life, Ellie. You keep on the path and all's well. You get off it and the next thing you know you're lost if you're not lucky.