No man ever threw away life while it was worth keeping. - David Hume

It is difficult for a man to speak long of himself without vanity.

That I am ready to throw all of my books and papers into the fire, and resolve never more to renounce the pleasure of life for the sake of reasoning and philosophy.

There is nothing in any object, consider'd in itself, which can afford us a reason for drawing a conclusion beyond it; [...] even after the observation of the frequent or constant conjunction of objects, we have no reason to draw any inference concerning any object beyond those of which we have had experience.