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)

He who has a ‘why’ to live, can bear with almost any ‘how’. (Friedrich Nietzsche)

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)