Boyd Packer, Our Father’s Plan, pg. 42; “As with our knowledge of the premortal life, there is little to be gained by seeking after the mysteries, for there is hardly time in a lifetime to master the plain and precious things. The facts we know are these…When we die as to mortality, the spirit leaves the body and is taken to a place of rest….”
Ephesians 1:9-12; “Having made known unto us the mystery of his will, according to his good pleasure which he hath purposed in himself: 10 That in the dispensation of the fulness of times he might gather together in one all things in Christ, both which are in heaven, and which are on earth; even in him: 11 In whom also we have obtained an inheritance, being predestinated according to the purpose of him who worketh all things after the counsel of his own will: 12 That we should be to the praise of his glory, who first trusted in Christ.”
If God made the mystery of His will known to us then why wouldn’t it benefit us to know this?