I believe we will grasp a lot more but are you suggesting we literally receive 'the mind of God'? We will grasp where God comes from?
I hope you are right, that question will give us headaches in heaven.
Are you thinking that when Paul used the phrase 'mind of Christ'. he meant 'mind of God'? Are they to be understood as the same thing?
The mind of Christ in action:
Luk 22:42. saying, "Father, if you are willing, remove this cup from me. Nevertheless, not my will, but yours, be done."
Joh 8:28. So Jesus said to them, "When you have lifted up the Son of Man, then you will know that I am he, and that I do nothing on my own authority, but speak just as the Father taught me.
Joh 5:30. "I can do nothing on my own. As I hear, I judge, and my judgment is just, because I seek not my own will but the will of him who sent me.
When we run around 'half cocked' doing in our own prideful strength, do we have the mind of Christ?
Instead of our own prideful ways, we ought rather to strive in this vane;
Eph 4:11. And he gave the apostles, the prophets, the evangelists, the shepherds and teachers,
Eph 4:12. to equip the saints for the work of ministry, for building up the body of Christ,
Eph 4:13. until we all attain to the unity of the faith and of the knowledge of the Son of God, to mature manhood, to the measure of the stature of the fullness of Christ,
This I think would be the path to attaining to the mind of Christ.