It is the business of the future to be dangerous; and it is among the merits of science that it equips the future for its duties. 835
True courage is not the brutal force of vulgar heroes, but the firm resolve of virtue and reason. 277
No one who achieves success does so without acknowledging the help of others. The wise and confident acknowledge this help with gratitude. 890
Wisdom alone is true ambition’s aim, wisdom is the source of virtue and of fame; obtained with labour, for mankind employed, and then, when most you share it, best enjoyed. 265
In formal logic, a contradiction is the signal of defeat, but in the evolution of real knowledge it marks the first step in progress toward a victory. 183
