There is no possession more valuable than a good and faithful friend.

Failure is a great teacher, and I think when you make mistakes and you recover from them and you treat them as valuable learning experiences, then you've got something to share.

If I have ever made any valuable discoveries, it has been owing more to patient attention, than to any other talent.

If I have ever made any valuable discoveries, it has been due more to patient attention, than to any other talent.