True humility is contentment.
He who is too much afraid of being duped has lost the power of being magnanimous.
Philosophy starts with doubt and loves only truth.
Work while you have the light. You are responsible for the talent that has been entrusted to you.
Uncertainty is the refuge of hope.
True poetry is truer than science, because it is synthetic, and seizes at once what the combination of all the sciences is able, at most, to attain as a final result.