I put forward formless and unresolved notions, as do those who publish doubtful questions to debate in the schools, not to establish the truth but to seek it.
The Vietnam War and the Iraq war, in different ways, both made me feel like I could not not address them. I’m very doubtful about the usefulness of poetry to do that.
All those who offer an opinion on any doubtful point should first clear their minds of every sentiment of dislike, friendship, anger or pity.
The fatal tendency of mankind to leave off thinking about a thing when it is no longer doubtful is the cause of half their errors.
Nothing seems to me more doubtful than Aristotle’s remark that it is probable the arts and philosophy have several times been discovered and several times lost.
All who consult on doubtful matters, should be void of hatred, friendship, anger, and pity.