20 Knowing this first, that no bprophecy of the scripture is of any private interpretation.
21 For the prophecy came not in old time by the will of man: but holy men of God spake as they were moved by the Holy Ghost.
This means that if you want to know what Isaih was talking about, you need to obtain the same Spirit he wrote it under.
1 Corinthians 2:11-14
11 For what man knoweth the things of a man, save the spirit of man which is in him? even so the things of God knoweth no man, but the Spirit of God.
12 Now we have received, not the spirit of the world, but the spirit which is of God; that we might know the things that are freely given to us of God.
13 Which things also we speak, not in the words which man’s wisdom teacheth, but which the Holy Ghost teacheth; comparing spiritual things with spiritual.
14 But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned.
This principle is a principle of growth. Christ himself learned in the same way during his mortality. There is nothing Christ achieved in reference to his learning line upon line that we ourselves cannot do.
Gaz
We can easily forgive a child who is afraid of the dark; the real tragedy of life is when men are afraid of the light. - Plato