Leaving that for further elaboration then to-morrow, let us try to answer the next question, "How arises this need for Avatâras?" because in the minds of some, quite naturally, a difficulty does arise. The difficulty that many thoughtful people feel may be formulated thus: "Surely the whole plan of the world is in the mind of the Logos from the beginning, and surely we cannot suppose that He is working like a human workman, not thoroughly understanding that at which He aims. He must be the architect as well as the builder; He must make the plan as well as carry it out. He is not like the mason who puts a stone in the wall where he is told, and knows nothing of the architecture of the building to which he is contributing. He is the master-builder, the great architect of the universe, and everything in the plan of that universe must be in His mind ere ever the universe began. But if that be so--and we cannot think otherwise--how is it that the need for special intervention arises? Does not the fact of special intervention imply some unforeseen difficulty that has arisen? If there must be a kind of interference with the working out of the plan, does that not look as if in the original plan some force was left out of account, some difficulty had not been seen, something had arisen for which preparation had not been made? If it be not so, why the need for interference, which looks as though it were brought about to meet an unforeseen event?" A natural, reasonable, and perfectly fair question. Let us try to answer it. I do not believe in shirking difficulties; it is better to look them in the face, and see if an answer be possible. Now the answer comes along three different lines. There are three great classes of facts, each of which contributes to the necessity; and each, foreseen by the Logos, is definitely prepared for as needing a particular manifestation.