You must not procrastinate. Rather, you should make preparations so that even if you did die tonight, you would have no regrets. If you develop an appreciation for the uncertainty and imminence of death, your sense of the importance of using your time wisely will get stronger and stronger.
I know, that since life is our most precious gift, and as far as we can be absolutely certain, it's given to us to live but once, let us so live we will not regret years of useless virtue, and inertia, and timidity, and ignorance, and in our last moments we can say: 'All my life, all my conscious energies, have been dedicated to the most noble cause in the world, the liberation of the human mind and spirit - beginning with my own'.
Who that has plodded on to middle age would take back upon his shoulders ten of the vanished years, with their mingled pleasures and pains? Who would return to the youth he is forever pretending to regret?
I can imagine no greater disservice to the country than to establish a system of censorship that would deny to the people of a free republic like our own their indisputable right to criticize their own public officials. While exercising the great powers of the office I hold, I would regret in a crisis like the one through which we are now passing to lose the benefit of patriotic and intelligent criticism.
Forget the dead, the past? O yet there are ghosts that may take revenge for it, memories that make the heart a tomb, regrets which gild thro’ the spirit’s gloom, and with ghastly whispers tell that joy, once lost, is pain.
Yet you shall not deplore having known blindness, nor regret having been deaf. For in that day you shall know the hidden purposes in all things. And you shall bless darkness as you would bless light.
Every noble work is bound to face problems and obstacles. It is important to check your goal and motivation thoroughly. One should be very truthful, honest, and reasonable. One's actions should be good for others, and for oneself as well. Once a positive goal is chosen, you should decide to pursue it all the way to the end. Even if it is not realized, at least there will be no regret.
We will never regret the kind words spoken or the affection shown. Rather, our regrets will come if such things are omitted from our relationships with those who mean the most to us.