The power of memories and expectations is such that for most human beings, the past and the future are not as real, but rather more real than the present.
Cowardice, as distinguished from panic, is almost always simply a lack of ability to suspend the functioning of the imagination. Learning to suspend your imagination and live completely in the very second of the present with no before and no after is the greatest gift a soldier can acquire.
...from the time of Kepler to that of Newton, and from Newton to Hartley, not only all things in external nature, but the subtlest mysteries of life and organization, and even of the intellect and moral being, were conjured within the magic circle of mathematical formulae.
In all the languages in the world, there is the same proverb: "What the eyes don't see, the heart doesn't grieve over." Well, I say that there isn't an ounce of truth in it. The further off they are, the closer to the heart are all those feelings that we try to repress and forget.
Remember one very fundamental thing about life: Any experience that has not been lived will hang around you, will persist: "Finish me! Live me! Complete me!" There is an intrinsic quality in every experience that it tends and wants to be finished, completed. Once completed, it evaporates; incomplete, it persists, it tortures you, it haunts you, it attracts your attention. It says, "What are you going to do about me? I am still incomplete - fulfill me!"