I don't expect to retire. Every man must work, that's his natural destiny.
Every experience is worth having.
Thinking is the hardest work there is, which is probably the reason why so few engage in it.
Life is work, and everything you do is so much more experience. Sometimes you work for wages, sometimes not, but what does anybody make but a living? And whatever you have you must either use or lose.
Even a mistake may turn out to be the one thing necessary to a worthwhile achievement.
The best way to make money in business is not to think too much about making it.