Also it is important to put the happiness of the children rather carefully in its place, which is really not a front place. The unsympathetic, selfish, hard people who regard happiness as a very exceptional indulgence to which children are by no means entitled, though they may be allowed a very little of it on their birthdays or at Christmas, are sometimes better parents in effect than those who imagine that children are as capable of happiness as adults. Adults habitually exaggerate their own capacity in that direction grossly; yet most adults can stand an allowance of happiness that would be quite thrown away on children. The secret of being miserable is to have leisure to bother about whether you are happy or not. The cure for it is occupation, because occupation means pre-occupation; and the pre-occupied person is neither happy nor unhappy, but simply alive and active, which is pleasanter than any happiness until you are tired of it. That is why it is necessary to happiness that one should be tired. Music after dinner is pleasant: music before breakfast is so unpleasant as to be clearly unnatural. To people who are not overworked holidays are a nuisance. To people who are, and who can afford them, they are a troublesome necessity. A perpetual holiday is a good working definition of hell.