the evil emotion imposed from outside. The further result of that, if you be strong enough, will be to correct the bad vibration in the astral body of the man who is near you, and so, by correcting that vibration into harmony with your own, to produce in him your own good emotion, instead of having your emotion controlled by his. That is the ordinary science of the emotions that every aspirant for the higher life is set to practise in his daily life. He is first told the theory, so that he may understand what he is doing, and then he is set to the practise, so that by the practise he may realise the truth of the law that his teacher has explained. Sometimes the ethical teacher only says: “Love your enemies, do good to them that hate you.” With the unspiritual hearer the question will very readily arise, “Why should I give love when hatred is given to me?” Only knowledge will enable you to understand the wisdom that underlies this precept of all the great teachers of the past. Speaking in an age when authority was valid, and when people were willing to accept the precept from one whom they recognised as greater than themselves, they only proclaimed the law, and the docile hearer tried to obey. In our own more critical and combative age it is necessary to justify wisdom to a more critical and carping generation, and so the full explanation is given which shows you the scientific truth which underlies the ethical precept. That runs through the whole of the working of our bodies, the whole of the changes in our consciousness. You can work it out step by step, or you can read the working out which has been made by a thoughtful student,[3] and so you will have a veritable science of the emotions, and you will go out into the world a source of peace, a source of blessing, a source of all good emotions, helping the weaker by your own knowledge and your own strength, and so enabling them to climb more quickly by giving this helping hand out of the knowledge that you have learned.