"At each of the great Initiations, which mark the advance of the neophyte along the of the higher 25rogress, a definite new block of knowledge is given to him. That is quite true, but the knowledge can be given only because the recipient has evolved to the point at which he can grasp it. It is no more being withheld from ordinary humanity than the knowledge of conic sections is being withheld from the child who is still struggling with the multiplication-table. When that child reaches the level at which he can comprehend quadratic equations, the teacher is ready to explain to him the rules which govern them. In exactly the same way..."
January 1, 1970
https://en.wikiquote.org/wiki/Occultism