In scientific work, those who refuse to go beyond ...

In science, as in art, and, as I believe, in every other sphere of human activity, there may be wisdom in a multitude of counsellors, but it is only in one or two of them.

Science is simply common sense at its best, that is, rigidly accurate in observation, and merciless to fallacy in logic.

The best men of the best epochs are simply those who make the fewest blunders and commit the fewest sins.

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.