As is the inventor of murder, and the father of art, Cain must have been a man of first-rate genius.

Man should forget his anger before he lies down to sleep.

In many walks of life, a conscience is a more expensive encumbrance than a wife or a carriage.

It was a Sunday afternoon, wet and cheerless; and a duller spectacle this earth of ours has not to show than a rainy Sunday in London.

Solitude, though it may be silent as light, is like light, the mightiest of agencies; for solitude is essential to man. All men come into this world alone and leave it alone.

All that is literature seeks to communicate power

Thou hast the keys of Paradise, oh, just, subtle, and mighty opium!

There is a necessity for a regulating discipline of exercise that, whilst evoking the human energies, will not suffer them to be wasted.

Nobody will laugh long who deals much with opium: its pleasures even are of a grave and solemn complexion.

Fierce sectarianism breeds fierce latitudinarianism.

Kings should disdain to die, and only disappear.

The desire of death will not always lead you to death but the fear of death will.

Just as we know when we strike a metaphorical nerve with someone, we also know when we tap into what inspires them.

I'm thankful to have time to write.

Science is not a sacred cow. Science is a horse. Don’t worship it. Feed it. [Addressing a group of prospective contributors to an Israeli scientific research program]

I really suggest the Pendragon series to all readers unless you are afraid of gore!

There are so many things to take into account - your ambition, your ego, the press, the consumers. You can never be sure that you'll be on top of the pile again.

He was a man. Men always had lewd thoughts. It was perfectly natural and normal

When it becomes really impossible to get away and sleep, then the will to live evaporates of its own accord.

Let us respect the unique character and the personal world of each and every human being

It is correct to make a priority of young people, taking care that they turn out as well as possible.