We are confused because we use words today in a different manner than those who lived at the time the Bible was written.
First of all... the word "heart." It applies to man and angels. God has no need to make conclusions. He knows all things.
Here are some passages that may help better understand what the use of the word "heart" meant in days the Bible was written.
Starting with Lucifer...
For you have said in your heart:
‘I will ascend into heaven,
I will exalt my throne above the stars of God;
I will also sit on the mount of the congregation
On the farthest sides of the north;
I will ascend above the heights of the clouds,
I will be like the Most High.’ Isa 14:13-14
The heart is where Lucifer made his final conclusion after the consideration of gathering the facts, but he did so wrongly in his case.
And, lets get back to us humans...
as a man thinks in his heart so is he
For as he thinks in his heart, so is he.
“Eat and drink!” he says to you,
But his heart is not with you." Prov 23:7
Its easy to know God's heart... Know His Word in depth and accuracy. That takes God providing the right teachers to learn from. To say God does not do that today is to not know the mind (thinking) of Christ.
We have the mind of Christ? That means we have the 'thinking' of Christ. How did Jesus think? Just read about his temptation and how he countered the Devil and you will see a prime example of the thinking of Christ. "It is written."
To have the Word properly understood and stored away in your spiritual tool chest is to have the mind of Christ ready for use at a moment's notice.
With all the lousy and terrible teachings all around us today.. God is still God. He will have reserved a 'few' good men available for the body of Christ in every generation that still has some who seek His Face.
James 3:1 tells us that if we were
all being led of the Spirit? Only a few would be found to be teachers. Only a few should ever teach... But, today? Its become an insane asylum of many different teachings.
For the time will come when they will not put up with sound doctrine.
Instead, to suit their own desires, they will gather around them a great
number of teachers to say what their itching ears want to hear. 2 Tim 4:3
That's where we find ourselves today.
Do you have the THINKING (mind) of Christ?
We all need to keep on growing in grace and knowledge (2 Peter 3:18) for that reason. Till the day we die we should seek to learn something more than we already have learned... Growing more into the mind we have been given by God at regeneration.
grace and peace .........