To feel our character, our personality, and our personal, hard-won history fade from being is to be exposed to whatever lies beneath these comforting, operational conveniences. What remains when the conscious and functioning self has been erased is mankind's fundamental condition _ irrational, violent, guilt-wracked, despairing, and mad.

(there is) no other means of escaping from one's consciousness than to deny it, to look upon it as an organic disease of the terrestrial intelligence - a disease which we must endeavor to cure by an action which must appear to us an action of violent and willful madness, but which, on the other side of our appearances, is probably an action of health. ("Of Immortality")

There are no higher levels of consciousness, there are only different ways of perceiving things.

In stating these matters, I speak an open and disinterested language, dictated by no passion but that of humanity. To me, who have not only refused offers, because I thought them improper, but have declined rewards I might with reputation have accepted, it is no wonder that meanness and imposition appear disgustful. Independence is my happiness, and I view things as they are, without regard to place or person; my country is the world, and my religion is to do good.

Enjoy the rainbow while it lasts and don't chase it when it's gone.

Happiness: the feeling of being alive.