This, however, also has its limitation. Since reason is the slave of the mind, reason is as changeable as the weather; reason obeys our impressions. If we have an impulse to insult a person, or to fight with him, we can produce many reasons for it. It may be that afterwards there will be contrary reasons; but at the time, while we have this impulse, right or wrong, there is always a reason which supports it. Have the criminals put in jail committed crimes without a reason? No, they have a reason too. It does not fit in with the law perhaps, it does not satisfy society, but if we ask them, they have a reason. The reason we have today we may perhaps change next week, but nevertheless this third belief makes us stand on our own feet, for that moment if not always; and it gives us a greater power to defend our belief.