A man's liberal and conservative phases seem to follow each other in a succession of waves from the time he is born. Children are radicals. Youths are conservatives, with a dash of criminal negligence. Men in their prime are liberals (as long as their digestion keeps pace with their intellect). The middle aged run to shelter: they insure their life, draft a will, accumulate mementos and occasional tables, and hope for security. And then comes old age, which repeats childhood -- a time full of humors and sadness, but often full of courage and even prophecy.