So far as feelings were concerned, there was no discrepancy between the very finest feeling in this world and the very worst; that their effect was the same; that no visible difference existed between murderous intent and feelings of deep compassion.

I have always maintained that, excepting fools, men did not differ much in intellect, only in zeal and hard work; and I still think there is an eminently important difference.

The greater intellect one has, the more originality one finds in men. Ordinary persons find no difference between men.

There is no fundamental difference between man and animals in their ability to feel pleasure and pain, happiness, and misery.

The difference between men is in their principle of association. Some men classify objects by color and size and other accidents of appearance; others by intrinsic likeness, or by the relation of cause and effect. The progress of the intellect is to the clearer vision of causes, which neglects surface differences. To the poet, to the philosopher, to the saint, all things are friendly and sacred, all events profitable, all days holy, all men divine. For the eye is fastened on the life, and slights the circumstance. Every chemical substance, every plant, every animal in its growth, teaches the unity of cause, the variety of appearance.

There is only a difference of proportion of madness between an average man and a mad man; the quality of madness is the same.

Though good and bad men suffer alike, we must not suppose that there is no difference between the men themselves, because there is no difference in what they both suffer. For even in the likeness of the sufferings, there remains an unlikeness in the sufferers; and though exposed to the same anguish, virtue and vice are not the same thing. For as the same fire causes gold to glow brightly, and chaff to smoke; and under the same flail the straw is beaten small, while the grain is cleansed; and as the lees are not mixed with the oil, though squeezed out of the vat by the same pressure, so the same violence of affliction proves, purges, clarifies the good, but damns, ruins, exterminates the wicked.

There's no difference between a madman and a professor...it should be clear to you in the way they dress, act and think.

There is no difference between acute schizophrenia and a world at war.

I believe that there are no innate, intrinsic differences among a human being , a baboon or a grain of sand.

The oppressed do not see too much difference between those who would keep them down and those who do nothing to help. There is no in-between.

Men do not differ much about what things they will call evils; they differ enormously about what evils they will call excusable.

There's no difference between one's killing
and making decisions that will send others to kill.
It's exactly the same thing, or even worse.

That however the brains and abilities of men may differ, their stomachs are essentially the same.