Is GOD in your heart.as well as in your head?

The sad thing is a lot of christians are so far from GOD that they don"t even realize it. What is the condition of your heart, towards GOD? Are you sure, beyond a shadow of a doubt, that JESUS lives in you,not that HE uses you, but does JESUS live in your heart? We look saved; act saved; do saved stuff; we even know how to project a saved image to others,yet our heart is not even close to GOD.Have we mastered the act of salvation, become great pretenders. Take heed to Matthew 25:41-46 "Then shall he say also unto them on the left hand. Depart from me,ye cursed, into everlasting fire,prepared for the devil and his angels:(42)For I was hungred, and ye gave me no meat: I was thirsty,and ye gave me no drink:(43)I was a stranger,and ye took me not in: naked, and ye clothed me not: sick,or in prison,and ye visited me not.(44)Then shall they also answer him, saying LORD when we saw thee a hungred, or athirst, or a stranger, or naked, or sick, or in prison, and did not minister unto thee? (45)Then shall HE answer them, saying. Verily I say unto you, Inasmuch as ye did it not to one of the least of these,ye did it not to me.(46)And these shall go away into everlasting punishment: but the righteous into life eternal."