This does not mean that justice is erratic or variable, but that the times over which it presides are not always the same, for it is the nature of times to change. Man's life on earth is short and he cannot, by his own perception, see the connexion between the conditions of earlier times and of other nations, which he has not experienced himself, and those of his own times, which are familiar to him. But when only one individual, one day, or one house is concerned, he can easily see what is suitable for each part of the whole and for each member of the household, and what must be done at which times and places. These things he accepts: but with the habits of other ages he finds fault!