Jude 1:10

But these men sneer at anything which they do not understand; and whatever they do know by (mere) instinct, like unreasoning and irrational beasts-by these things they are destroyed.

We must guard against reasoning and being scoffers of the things of God we may not understand. We are the created and have a level of understanding of our world fathoms lower the God the creator. That is what faith in God the source is about—believing that what God says is true and faithful. By this, we avoid destruction from lack of knowledge.