I actually love this topic. It has been argued for thousands of years. Why? Because no matter how you slice it, we will never know how consciousness exists. Oh we may say it originates here or there. But how? We will never know. But one thing is for sure, you can talk about the "mind" simply being a product of chemical reactions till the cows come home ( and you are correct), but no matter what comes out of your mouth on this forum, your HEART tells you that you are greater than the sum of the parts. You can deny that all you want, but you (plural) are full of crap. Speaking of heart, has it occurred to you that it is only in recent years that scientists are beginning to see that the heart is more than just a pump? It is known as the "little brain". The heart's reaction, was once viewed as the byproduct of the brains thoughts or feelings. But now, that may be changing. Scientists are only beginning to learn about this. In otherwords, the issue is far more complex than imagined. Here is for starters: http://www.mindfulmuscle.com/heart-has-consciousness-knows-before-brain/
What can I say? Hmmm.... Well my heart says...
"I will give thanks to you, for I am fearfully and wonderfully made. Your works are wonderful. My soul knows that very well." - Psalm: 139:14
And your SOUL knows that as well.