Success isn't measured by money or power or social rank. Success is measured by your discipline and inner peace.

Not every difficult and dangerous thing is suitable for training, but only that which is conducive to success in achieving the object of our effort.

Youth is not enough. And love is not enough. And success is not enough. And, if we could achieve it, enough would not be enough.

I just go where my heart tells me, where my gut tells me to go, where I'm enjoying my life the most, where I feel like I can have the most success. I've truly enjoyed my experience in NASCAR, to the point that I want to do it full time.

Every failure is a step to success.