I must study politics and war that my sons may have liberty to study mathematics and philosophy.

I must study politics and war that my sons may have liberty to study mathematics and philosophy. My sons ought to study mathematics and philosophy, geography, natural history, naval architecture, navigation, commerce and agriculture in order to give their children a right to study painting, poetry, music, architecture, statuary, tapestry, and porcelain.

I must study politics and war, that my sons may have the liberty to study mathematics and philosophy, natural history and naval architecture, in order to give their children a right to study painting, poetry, music, architecture, tapestry, and porcelain.

I must not write a word to you about politics, because you are a woman.

Liberty can not be preserved without a general knowledge among the people.

I must study politics and war that my sons may have liberty to study mathematics and philosophy.