For the past 33 years， I have looked in the mirror every morning and asked myself: 'If today were the last day of my life， would I want to do what I am about to do today？' And whenever the answer has been 'No' for too many days in a row， I know I need to change something.

I think we are all capable of terrible things under the right circumstances.

The only truly secure system is one that is powered off, cast in a block of concrete and sealed in a lead-lined room with armed guards - and even then I have my doubts.

I train, I focus, I believe, and I achieve.

心脏是一块坚韧的小肌肉。

The loss of money is the least of all losses, but the loss of confidence is the greatest of all.