I do not feel obliged to believe that the same God who has endowed us with sense, reason, and intellect has intended us to forgo their use. (Galileo Galilei)

The full use of your powers along lines of excellence. (definition of happiness by John F. Kennedy)

Whenever I climb I am followed by a dog called ‘Ego’. (Friedrich Nietzsche)

In the End, we will remember not the words of our enemies, but the silence of our friends. (Martin Luther King Jr.)

Talent does what it can; genius does what it must. (Edward George Bulwer-Lytton)