In theory, there is no difference between theory and practice. But in practice, there is. (Yogi Berra)

The difference between ‘involvement’ and ‘commitment’ is like an eggs-and-ham breakfast: the chicken was ‘involved’ – the pig was ‘committed’. (unknown)

There are no facts, only interpretations. (Friedrich Nietzsche)

In theory, there is no difference between theory and practice. But in practice, there is. (Yogi Berra)

All are lunatics, but he who can analyze his delusion is called a philosopher. (Ambrose Bierce)

The fundamental cause of trouble in the world is that the stupid are cocksure while the intelligent are full of doubt. (Bertrand Russell)

I have not failed. I’ve just found 10,000 ways that won’t work. (Thomas Alva Edison)

I don’t know why we are here, but I’m pretty sure that it is not in order to enjoy ourselves. (Ludwig Wittgenstein)