Interesting. Never thought about love as being purely chemical. Lust, yes, but love, no.
While love might stimulate chemical changes those changes are not what initiate love. Love is much deeper....spiritual. Love is built on experiences shared between people. A collection of chemical storage records in the brain....but it is something obviously more. The chemical 'reactions' in the brain that would spur one to risk, and give, one's own life for that of another are quite a bit different that those of lust, for which chemical reactions I would not risk my own hide simply because the chemical reactions for self-preservation are stronger.....so I would suggest that there is an extra ingredient in love that chemical reactions can not explain.
It is the same love that would enable you to give everything for your child, or for your Savior to give everything for you in order that you might believe and LIVE.
Chemical reactions do not explain love, in the same way that science does not explain God....yet we can detect God. To look at the multitude of very different and beautiful floura, fauna and physical earthly topography and not recognize a design is to take everything for granted....'it just developed by mutations (which to my understanding are not consistently reproducable) and natural selection'. Not only this, but we have His Word as well, as handed down to us in the Bible. If we look at recent arceological findings we can see that the more we discover, the more we find that the historical correctness of the Bible is evident.
How did the Arc get to the top of Mt. Ararat?
Why are Egyptian chariot parts laying at the bottom of the Red Sea?
What is thought to be Josheph's tomb has been uncovered in Egypt, but is empty because, as Moses commanded, the Israelites carried the body to where it lays now, in the promised land.
What is thought to be Jerico has recently been uncovered. It has been discovered that the walls have all fallen in unnatuaral ways and the spoils burned...however the wheat harvest was left untouched and plentiful to correspond to Biblical references about the city being taken by the Israelites marching on the city in a season just following the harvest. As most sieges lasted several months or years, the abundant supply of grain remaining in the ruins suggest a rapid fall to the city. The Bible says the city was taken in a period of days.
Biblical accounts record a day in 1500 BC where Joshua called on the Lord to prolong the day so as to finish off a defeated enemy. The Lord responded by stopping the earth for one day. Half a world away, in 1500 BC Miyan calendars record a day that the sun did not rise!
Sodem and Gamora have been found and the ruins excavated. Found are roof tops with burn marks from the top.
In what was called the wilderness in the Bible, where the Israelites wandered for 40 years, and current day science suggest that sustained populated living could not occur, arceologists have found relicas and garbage from a prolonged inhabitation.
Christ's body has never been found!
12 disiples believed enough in a man called the Christ, that 11 of them gave their lives, violently, in His name.
Biblical history cries out to be heard and is verified through other sources if one only looks. Pilate was govenor of Judea in Christ's lifetime...history bears this out. History also bears out His trial, which occured under very unusual circumstances and for significant parts, against Hebrew law (take a gander at "Who moved the Stone" by Franklin Morris (or Morrison). He was a non-believer bent on exposing Christianity as the farce that he thought it was, did some research, and became a believer.
My own belief has lead me to observe a cause and effect relationship between my prayers and His answers. It can be as subtle as a strangly timed phone call or a 2 year old initiating a conversation to ask Christ into her heart a day or two after an anguised parents fervent prayer, or as witnessed a few weeks ago, a lightning strike after a midnight prayer.
I say all this to give faith in the Father and His Son. If faith is present, then one believes His Word. If one believe's His Word, then evolution as proposed by Darwin is not Truth in the believer's mind.
I can see evolutionary developments of existing structures (hair, arm strength, resiratory stamina, etc.) as possible and probable. But the type of evolution that tries to explain how a simple organism develops sight through the creation of a vison detection object and the theory behind the image collection system, the accompaning nerve connections and the simultaneous brain function to process the visual signals and present those to other parts of the brain and process it as meaningful data seems very unreasonable to me and statistically impossible.