As far as the laws of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality.
It is the duty of every citizen according to his best capacities to give validity to his convictions in political affairs.
To punish me for my contempt for authority, fate made me an authority myself.
In theory there is no difference between theory and practice. In practice there is.
I would no more teach children military training than teach them arson, robbery, or assassination.
Eugene V. Debs
Labor is prior to, and independent of, capital. Capital is only the fruit of labor, and could never have existed if labor had not first existed. Labor is the superior of capital, and deserves much higher consideration.
Reasoning was not designed to pursue the truth. Reasoning was designed by evolution to help us win arguments.
Jonathan Haidt, 2011, explaining the theory of Hugo Mercier and Dan Sperber.
Joys divided are increased.
Josiah Gilbert Holland
The reasonable man adapts himself to the world: the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.