As the heading says "Life is not a practice". You only have one chance so get up and take it. Don't wait for tomorrow - follow your dreams and do it today.
We are given only one life. Surely its days are to be spent rather than hoarded, and given rather than spent? Everything should go to grasp what is best while it can be meaningful. What use is 'security' twenty years hence if that is all those years give? Life should be lived greatly from day to day."
Hamish Brown in Hamish's Mountain Walk