Like all that comes from God, this doctrine is pure, it is clear, it is
easy to understand—even for a child.
D Todd Christofferson
I accept, and indeed embrace this as an axiom - because I believe it is the pervasive implicit message of the whole Bible, but especially the New Testament.
What comes from God is easy to understand.
It can become as complex as the human mind can attain to - and this may be enjoyable, challenging, motivating for some individuals (and I am one of them), and it may be a means to the end of appropriating doctrine into the heart - but ultimately all this is difficulty is unnecessary.
Underneath the abstractions of theology, metaphysics, philosophy, history, analysis and investigation lies crystalline transparency of doctrine, through which the truth is easily perceived.
That a child must be able to understand, is therefore a test of doctrine.