It is work, work that one delights in, that is the surest guarantor of happiness. But even here it is a work that has to be earned by labor in one's earlier years. One should labor so hard in youth that everything one does subsequently is easy by comparison.
There have been some medical schools in which somewhere along the assembly line, a faculty member has informed the students, not so much by what he said but by what he did, that there is an intimate relation between curing and caring.
The deepest human defeat suffered by human beings is constituted by the difference between what one was capable of becoming and what one has in fact become.