One never notices what has been done; one can only see what remains to be done.

Remember the Three Princes of Serendip who went out looking for treasure? They didn't find what they were looking for, but they kept finding things just as valuable. That's serendipity, and our business [drugs] is full of it.

Good information is the best medicine.

The cures we want aren’t going to fall from the sky. We have to get ladders and climb up and get them.

I am not accustomed to saying anything with certainty after only one or two observations.

All truths are easy to understand once they are discovered; the point is to discover them.

Let me tell you the secret that has led me to my goal. My strength lies solely in my tenacity.

I trust I may be enabled in the treatment of patients always to act with a single eye to their good.

The greatest joy in life is to accomplish. It is the getting, not the having. It is the giving, not the keeping.

The reward for work well done is the opportunity to do more.