from my point of view, i don't think anyone really controls their mind. before i gave my mind to Christ i was controlled by passions, lusts and all kinds of wicked things that lived in my heart, and not even "wicked" things but self-serving desires, and any devilish wind could blow my thinking where it pleased.
now Christ has been working in me, changing my heart and transforming my thinking. still i do the things i don't want to do, and don't do the things i want to do, so that it seems sometimes my mind can't control my body and my will can't control my mind either. i'm like a living mind transferred into the body of a zombie. i don't want to eat brains! but my body does. the apostle Paul wrote about this same thing.
at the basest of levels, i believe man is powerless to do any but one of two things: resist God or relent to Him. i think the nature of man is to be a vessel, if not for the Spirit of God, if we relent, than for another spirit, if we resist.
only Jesus can save us from that.