Jesus was fallen. He was made a little lower than the angels. He was in a position of being God then became mortal, partially anyways. Lets not forget he was divine also. Probably had far better communication with the Holy Ghost better than any of us. He being infinitely smarter than us even as he walked the earth would enable Him a greater ability to recognize sin of any type. It's hard to know just how much knowledge Christ had. He knew enough that he could do nothing except that which he has SEEN the Father do. By implication Christ has already had great visions on greater scales than that of Abraham in the PoGP even to the point of seeing the Father and His earthly ministry. I don't think it's comprehensible to know just how much Christ knew. What's also amazing, knowing Himself, his standing with God, and His position he was still able to be humble even to the point of washing the feet of the Apostles because His love of them and us was so great.