If we could travel into the past, it's mind-boggling what would be possible. For one thing, history would become an experimental science, which it certainly isn't today. The possible insights into our own past and nature and origins would be dazzling. For another, we would be facing the deep paradoxes of interfering with the scheme of causality that has led to our own time and ourselves. I have no idea whether it's possible, but it's certainly worth exploring.
You have enemies? Why, it is the story of every man who has done a great deed or created a new idea. It is the cloud which thunders around everything that shines. Fame must have enemies, as light must have gnats. Do no bother yourself about it; disdain. Keep your mind serene as you keep your life clear.
Now, you receive all your ideas; therefore you receive your wish, you wish therefore necessarily. The word "liberty" does not therefore belong in any way to your will....The will, therefore, is not a faculty that one can call free. A free will is an expression absolutely void of sense, and what the scholastics have called will of indifference, that is to say willing without cause, is a chimera unworthy of being combated.
As a rule, with me an unfinished [idea] is a thing that might as well be rubbed out. It's better, if there's something good in it that I might make use of elsewhere, to leave it at the back of my mind than on paper in a drawer. If I leave it in a drawer it remains the same thing but if it's in the memory it becomes transformed into something else.
And what's strange, what would be marvelous, is not that God should really exist; the marvel is that such an idea, the idea of the necessity of God, could enter the head of such a savage, vicious beast as man.
A State, in idea, is the opposite of a Church. A State regards classes, and not individuals; and it estimates classes, not by internal merit, but external accidents, as property, birth, etc. But a church does the reverse of this, and disregards all external accidents, and looks at men as individual persons, allowing no gradations of ranks, but such as greater or less wisdom, learning, and holiness ought to confer. A Church is, therefore, in idea, the only pure democracy.