“But his delight is in the law of the LORD; And in his law doth he meditate day and night.”
‭‭Psalm‬ ‭1‬:‭2‬

When God made Adam, he had talked about him: Genesis 1:26
He talked to him: Genesis 2:16-17
and obviously talked with him: Genesis 3:8-9
Every word Adam learnt, he learnt from God- slangs, vocabulary, thoughts- all came from God; he only knew the words of God until satan showed up and taught it was possible to receive contrary words and act against God’s word. Genesis 3:1,4
What this shows is that, man could have only known and meditated on the words of God day and night, and that would have been totally normal and expected and he would have walked in blessings continuously, but satan introduced words of disobedience, deviating from God’s original intent and leading men into destruction. See why it isn’t some impossible task for God to expect that you meditate on his word day and night?

Bible Reading Plan: Exodus 21 and John 16