"For My thoughts are not your thoughts, Nor are your ways My ways," declares the LORD.
Because of this verse, people think it's not possible to figure out God, but they fail to see the context of that verse, which shows us that the Lord is speaking about the wicked man. We can see this clearly by what verse 7 says.
Let the wicked forsake his way And the unrighteous man his thoughts; And let him return to the LORD, And He will have compassion on him, And to our God, For He will abundantly pardon.
However, the Christian is a new creation. We have the mind of Christ, who is God.
For who has known the mind of the Lord, that he will instruct him. But we have the mind of Christ. - 1Corinthians 2:16