Work and live to serve others, to leave the world ...

We cannot banish dangers, but we can banish fears. We must not demean life by standing in awe of death.

The will to persevere is often the difference between failure and success.

I have learned to have more faith in the scientist than he does in himself.

It were a real increase of human happiness, could all young men from the age of nineteen be covered under barrels, or rendered otherwise invisible and there left to follow their lawful studies and callings, till they emerged, sadder and wiser, at the age of twenty-five.

Oh, if I had been loved at the age of seventeen, what an idiot I would be today. Happiness is like smallpox: if you catch it too soon, it can completely ruin your constitution.

You get to a certain age where you prepare yourself for happiness. Sometimes you never remember to actually get happy.

I learned from a very young age that if I pursued the things that truly excited me, that they would reward in more important ways, like happiness.

I'm at peace with myself and where I am. In the past, I was always looking to see how everybody else was doing. I wasn't competitive, I was comparative. I just wanted to be where everybody else was. Now I've gotten to an age when I am not comparing anymore.

Peace is the one condition of survival in this nuclear age.

The true and solid peace of nations consists not in equality of arms, but in mutual trust alone.

We gave up some of our country to the white men, thinking that then we could have peace. We were mistaken. The white man would not let us alone.

Youth is the gift of nature, but age is a work of art.

It is utterly false and cruelly arbitrary to put all the play and learning into childhood, all the work into middle age, and all the regrets into old age.

Old age is not a matter for sorrow. It is matter for thanks if we have left our work done behind us.

Have regular hours for work and play make each day both useful and pleasant, and prove that you understand the worth of time by employing it well. Then youth will be delightful, old age will bring few regrets, and life will become a beautiful success.