The instruction of children should aim gradually to combine knowing and doing. Among all sciences mathematics seems to be the only one of a kind to satisfy this aim most completely.
Immanuel KantMost men use their knowledge only under guidance from others because they lack the courage to think independently using their own reasoning abilities. It takes intellectual daring to discover the truth.
Immanuel KantThe business of philosophy is not to give rules, but to analyze the private judgments of common reason.
Immanuel Kant