The most important of my discoveries have been suggested to me by my failures.

If we had a catastrophic failure with Discovery, we'd need to figure out how to prevent that same problem from occurring on Atlantis.

Life is made up, not of great sacrifices or duties, but of little things, in which smiles and kindness, and small obligations win and preserve the heart.

Life is made up, not of great sacrifices or duties, but of little things, in which smiles, and kindnesses, and small obligations, given habitually, are what win and preserve the heart and secure comfort

I have learned more from my mistakes than from my successes.

Language is not only the vehicle of thought, it is a great and efficient instrument in thinking.