David Goggins on Instagram: "Time. Time is running out! I know some of you think you are young and have so much time. I am here to tell you that in the blink of an eye, all that time is gone and all you will be left with is regret. That said, we do live in a different generation and I am sure that most of you probably don’t even give a fuck. But, for those who do, you better stop thinking and start fucking doing! Stay hard!"