He makes everybody unhappy, by being miserable himself for no reason at all.
Sometimes, indeed, he can be jolly enough--when he chooses.

No one could tell at such times that there was anything queer about him; but then all of a sudden he shows in his true colours (and dingy enough colours they are), and then it is all up with enjoyment till he takes himself off, which he generally does before long.
All this is very sad; and if I say a word or two about sulkiness now, it will be in the hope of inducing my readers to give no encouragement to so ugly a vice.
There are two ways of showing anger, when one is unfortunate enough to be under the necessity of being angry.

You can't always help it.

Some people are never put out.

However much you rile them, they are always good-humoured, always cool, always friendly.