This is not entirely true. Abraham's son wasn't sacrifice as commanded,
The first mention of Love in the Bible, "Take now thy son, thine only son Isaac, whom thou lovest . . ."
The true meaning of love!
When I say that God will never be different from His Word, I mean more like this, that what He shows of Himself in the Bible, and how we find Him in our hearts, it will always be the same.
A God in our hearts that is different from the God of the Bible is our mistake. So I agree, fill your mind constantly with the Bible, learn to think the way the Bible speaks, and when you hear God, you will recognize Him, from having been hearing already.
Much love!