There is a trade off - as you grow older you gain wisdom but you lose spontaneity.

You take all the experience and judgment of men over 50 out of the world and there wouldn't be enough left to run it.

Wisdom is the daughter of experience.

Although nature commences with reason and ends in experience it is necessary for us to do the opposite, that is to commence with experience and from this to proceed to investigate the reason.

Any attempts at autobiography before the age of eighty seem pretty self-involved to me. There are a lot of smart middle aged people but not many wise ones.

Experience is a truer guide than the words of others.