You can have self-control of what you think about
“Set your mind on the things above, not on the things that are on earth.” (Col. 3:2)
Galatians chapter five tells us that one of the nine fruits of the spirit is self-control. I am doing a short series discussing things that God has given us the ability to control. Here is another one.
You can have self-control of what you think about, i.e. your mind's mental fitness - what you think about, ponder, consider, meditate, contemplate, deliberate, and/or set your mind upon.
What you think about is at the heart of who you actually are and the Bible says it clearly in the following verse.
“For as he thinks in his heart, so is he.” (Prov. 23:7)
Be careful what you let your mind think about
" For it is from within, out of a person’s heart, that evil thoughts come—sexual immorality, theft, murder, adultery, greed, malice, deceit, lewdness, envy, slander, arrogance and folly. All these evils come from inside and defile a person.” (Mark 7:21-23)
You can renew your mind
“And do not be conformed to this world, but be transformed by the renewing of your mind, so that you may prove what the will of God is, that which is good and acceptable and perfect.” (Rom. 12:2)
Capture every thought and prepare your mind
“We are destroying speculations and every lofty thing raised up against the knowledge of God, and we are taking every thought captive to the obedience of Christ.” (2 Cor. 10:5)
“Therefore, prepare your minds for action, keep sober in spirit, fix your hope completely on the grace to be brought to you at the revelation of Jesus Christ.” (1 Pet. 1:13)
Dwell on excellent things
“Finally, brethren, whatever is true, whatever is honorable, whatever is right, whatever is pure, whatever is lovely, whatever is of good repute, if there is any excellence and if anything worthy of praise, dwell on these things.” (Phil. 4:8)
“A man's mind may be likened to a garden, which may be intelligently cultivated or allowed to run wild; but whether cultivated or neglected, it must, and will, bring forth. If no useful seeds are put into it, then an abundance of useless weed seeds will fall therein, and will continue to produce their kind.” - James Allen, As a Man Thinketh