I was taught the method for advancement is not quick or simple.

It's always good to marry your best friend.

Nothing in life is to be feared, it is only to be understood. Now is the time to understand more, so that we may fear less.

We must not forget that when radium was discovered no one knew that it would prove useful in hospitals.

This means that we have here an entirely separate kind of chemistry for which the current tool we use is the electrometer, not the balance, and which we might well call the chemistry of the imponderable.

I was taught that the way of progress was neither swift nor easy.

I never see what has been done; I only see what remains to be done.