I don’t let mistakes define me, I let them refine me.

When Henry Ford made cheap， reliable cars people said， ‘Nah， what’s wrong with a horse？’ That was a huge bet he made， and it worked.

自由的代价是永恒的警惕。

To be a philosopher is not merely to have subtle thoughts, nor even to found a school, but so to love wisdom as to live according to its dictates.