Misgive that you may not mistake.

To know your ruling passion, examine your castles in the air.

A man is called selfish not for pursuing his own good, but for neglecting his neighbor's.

Curiosity is as much the parent of attention, as attention is of memory.

It is the neglect of timely repair that makes rebuilding necessary.

Lose an hour in the morning, and you will spend all day looking for it.

To follow imperfect, uncertain, or corrupted traditions, in order to avoid erring in our own judgment, is but to exchange one danger for another.

Never argue at the dinner table, for the one who is not hungry gets the best of the argument.

Manners are one of the greatest engines of influence ever given to man.

To teach one who has no curiosity to learn, is to sow a field without ploughing it.

All frauds, like the wall daubed with untempered mortar ... always tend to the decay of what they are devised to support.

...a sensual life is a ghostly existence where you live on the surface and your soul passes through everything, touching nothing ...

None but the brave deserves the fair.

In my view, the only recourse for a scientist concerned about the social consequences of his work is to remain involved with it to the end.

That my complicated life could be made so simple was astounding.

There had to be a better way - if I couldn't find it, I wanted to create it.

It's a beautiful day in the neighborhood, a beautiful day for a neighbor. Would you be mine; could you be mine?

All other things to their destruction draw, Only our love hath no decay.

The line between greatness and obscurity is very, very small.

As a member of the House Subcommittee on Space and Aeronautics, I am a firm believer in the American space program.

It's important to be willing to make mistakes. The worst thing that can happen is you become memorable.