Joseph Fielding Smith has taught:
The Spirit of God speaking to the spirit of man has power to impart truth with greater effect and understanding than the truth can be imparted by personal contact even with heavenly beings. Through the Holy Ghost the truth is woven into the very fibre and sinews of the body so that it cannot be forgotten.
Chapter 14: The Gift of the Holy Ghost
I first heard this from Elder Callister in, what I think, may be my favorite General Conference talk I’ve ever heard.