All ambitions are lawful except those which climb upward on the miseries or credulities of mankind. All intellectual and artistic ambitions are permissible, up to and even beyond the limit of prudent sanity. They can hurt no one.
Truth of a modest sort I can promise you, and also sincerity. That complete, praiseworthy sincerity which, while it delivers one into the hands of one's enemies, is as likely as not to embroil one with one's friends.