One cannot drive with the same whip a friend, an acquaintance, and a stranger. There again the question of economy must be considered. Without the sense of economy, one might try the goodness, kindness, generosity, and endurance of others to such a degree that in the end of the trial it would work out to the disadvantage of both. The person who is sensible enough to guard his own interest in life may be called clever, but the one who guards the interests of others even more than his own is wise; for in this way he does things without knowing to his own advantage also. It is the same sense of economy which one uses with little things in one's daily life at home and in business; the same sense used in a higher form, by thoughtfulness and consideration, makes one more capable of serving others, which is the religion of religions.