Out of all that man can do, it is only God who by His Holy Spirit give man divine inspiration. ( 2 Peter 1:20-21 ) 20 Knowing this first, that no prophecy of the scripture is of any private interpretation. 21 For the prophecy came not in old time by the will of man: but holy men of God spake [as they were] moved by the Holy Spirit.
By the Holy Spirit man is guided and instructed in righteousness, and even as a small child a true christian knows what is of God and are wise through the faith found only in Christ. The passage “ Out of the mouths of babes and sucklings thou hast perfected praise” shows us the young have knowledge only given by God! ( 2 Timothy 3:14-17 ). 14 But continue thou in the things which thou hast learned and hast been assured of, knowing of whom thou hast learned [them]; 15 And that from a child thou hast known the holy scriptures, which are able to make thee wise unto salvation through faith which is in Christ Jesus. 16 All scripture [is] given by inspiration of God, and [is] profitable for doctrine, for reproof, for correction, for instruction in righteousness: 17 That the man of God may be perfect, throughly furnished unto all good works.