From the mind, which uses the brain. The heart pumps blood...
You do not know that brother. You're speaking from traditional thinking. They are making strides into understanding exactly how and where consciousness and thinking works and from where. Here's a few links to some of it:
(The idea that we can think with our hearts is no longer just a metaphor, but is, in fact, a very real phenomenon. We now know this because the combined research of two or three fields is proving that the heart is the major center of intelligence in human beings.)
http://theness.com/neurologicablog/index.php/brain-cells-in-the-heart/
http://www.ted.com/conversations/17643/is_the_heart_overlooked_when_i.html
http://www.rewireme.com/explorations/your-heart-and-stomach-may-be-smarter-than-you-think/
Just Google do we think with our brain or heart, and you will get slews of things to read about this question and most from the medical/scientific community. I'm not making this stuff up. Just because you're stuck on a 50 year old line of reasoning doesn't make you right, or an authority on the subject. New discoveries are made every day. Some right, some wrong, but one thing is clear, there's something to this and in order to make progress and learn, we have to be open minded enough to consider new ideas and scientific findings.
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There simply is no reason to think that we are thinking and reasoning now any differently than Adam and Eve did before the Fall...
Why?
Genesis 3:4-6
4 And the serpent said unto the woman, Ye shall not surely die:
5 For God doth know that in the day ye eat thereof, then your eyes shall be opened, and ye shall be as gods, knowing good and evil.
6 And when the woman saw that the tree was good for food, and that it was pleasant to the eyes, and a tree to be desired to make one wise, she took of the fruit thereof, and did eat, and gave also unto her husband with her; and he did eat./(KJV)
Reading in context, the serpent was explaining to Eve that after eating the fruit, she would be wiser, and know good & evil. (They would think differently?) They would be carnal then, and perhaps have a fleshy thought process (brain) rather than a spiritual thought process (heart). If not then why the biblical admonitions to guard diligently the heart.
Proverbs 4:23
23 Keep your heart with all diligence,
For out of it
spring the issues of life./(NKJV)
So if the heart pumps blood only and nothing else...what in the world could this mean?
No brother. There's more to the heart than pumping blood and scripture speaks of this here and in other places. Open your mind brother.
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Faith is based on reason; it is based on the evidences given to us in Scripture, for most people anyway. We have to then trust that what God revealed to us is true.
Hmmm, perhaps there is reason involved in faith, I'll give you that. We choose to have faith and put our trust into the Lord, and no matter how you stack it, one must reason and choose. BUT! From whence and where does this reason spring forth from? The brain or the heart? I've shown that scripture and science both point down a road which speaks of the heart having more significance than once supposed.
The Lord does not look at the outward man, but the heart.
1 Samuel 16:7
7 But the Lord said to Samuel, “Do not look at his appearance or at his physical stature, because I have refused him. For
the Lord does not
see as man sees; for man looks at the outward appearance, but the Lord looks at the heart.”/(NKJV)
Why would the Lord look at the heart. Why doesn't this say the Lord looks at the brain and thoughts of the man? ...but the Lord looks at the heart, because it has no significance except to pump blood...Uhh, yeah brother, I'm following you here. There's no reason to think that the heart has any significance other than pumping blood. (not).
Man may indeed be able to think with his brain. Man may also indeed be able to think with his heart. There may not be a whole lot of difference, but, any difference may be a whole lot more significant than you think. Like for instance, one is carnal and flesh bound, the other is spiritual and bound to God.
Now THAT brother, is reason enough right there to open our mind and consider the possibility of the truth of it. We're to live for the spirit. Maybe, just maybe, that learning to think with the heart is part of it. The renewing of the mind, as scripture says. Could that be what it is talking about? Perhaps.
Could all those teenage girls be wrong?