But we have reason to cool our raging motions, our carnal stings, our unbitted lusts; whereof I take this that you call love to bea sect or scion.... It is merely a lust of the blood and a permission of the will.
Forgiveness is the most effective way of dealing with arguments; altruism and forgiveness bring humanity together so that no conflict, however serious, will go beyond the bounds of what is truly human.
Act in such a way that you treat humanity, whether in your own person or in the person of any other, never merely as a means to an end, but always at the same time as an end.
There's something about when humanity goes from hoping they get lucky in finding something fermented to doing it on purpose. They don't understand what they've done until the late 1800s, but they know if they combine things in a certain way, they'll get something magic.
Every idea has to become broad till it covers the whole of this world, every aspiration must go on increasing till it has engulfed the whole of humanity, nay, the whole of life, within its scope.
It is only great pain--that slow, sustained pain that takes its time, in which we are, as it were, burned with smoldering green firewood--that forces us philosophers to sink to our ultimate profundity and to do away with all the trust, everything good-natured, veil-imposing, mild and middling, on which we may have previously based our humanity. I doubt that such a pain makes us 'better'--but I know that it makes us deeper.
In today's materialistic world there is a risk of people becoming slaves to money, as though they were simply cogs in a huge money-making machine. This does nothing for human dignity, freedom, and genuine well-being. Wealth should serve humanity, and not the other way around.