Meditation is okay, Psalm 19:
No, Matthew 12:
Instead of emptying your mind, Philippians 4:
Is it okay to empty for mind when meditating?14 Let the words of my mouth and the meditation of my heart be acceptable in your sight, O Lord, my rock and my redeemer.
No, Matthew 12:
By emptying the mind, I mean you create an empty spot in the mind, waiting for it to be filled by anything, while quieting the mind means to fill your mind with peace. Quieting the mind is okay.43 “When the unclean spirit has gone out of a person, it passes through waterless places seeking rest, but finds none. 44Then it says, ‘I will return to my house from which I came.’ And when it comes, it finds the house empty, swept, and put in order. 45Then it goes and brings with it seven other spirits more evil than itself, and they enter and dwell there, and the last state of that person is worse than the first. So also will it be with this evil generation.”
Instead of emptying your mind, Philippians 4:
1 Corinthians 2:8 Finally, brothers and sisters, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable—if anything is excellent or praiseworthy—think about such things.
See also Can Satan put thoughts into your mind?.16 for, “Who has known the mind of the Lord so as to instruct him?” But we have the mind of Christ.