Focus alone is not enough; putting in the time to commit is also crucial to achieve success.

The secret of success is focus of purpose.

The first requisite for success is to develop the ability to focus.

The key to success is emotional stability.

I've often felt there might be more to be gained by studying business failures than business successes.

Failure comes from ego, greed, envy, fear, imitation. I have success not because I am smart, but because I am rational.