The whole of science and one is tempted to think the whole of the life of any thinking man is trying to come to terms with the relationship between yourself and the natural world. Why are you here and how do you fit in and what's it all about.
Wrinkles should merely indicate where smiles have been.
Anyone who stops learning is old whether at twenty or eighty. Anyone who...
Age is an issue of mind over matter. If you don't mind it doesn't matter.