The Basis of Morality by Part 4 Chapter 2 Page 4

Now, if we examine the nature of such a man, not only as it affects others, but as it is in itself, we are enabled by the foregoing exposition to perceive that the virtues of justice and loving-kindness, which he practises, are due to a direct participation in weal and woe external to himself; and we have learnt that the source of such participation is Compassion.

If, further, we pause to consider what is the essential part in this type of character, we shall certainly find it to lie in the fact that such a person draws less distinction between himself and others than is usually done.

In the eyes of the malicious individual this difference is so great that he takes direct delight in the spectacle of suffering, — a delight, which he accordingly seeks without thought of any other