Enquiries into the existence of existence belong in the field of ontology and in this forum. So I will try to illuminate.
There are two aspects to existence. The subjective and the physical (some people can't agree on which is real). The atheist ignores the spiritual and focuses on the physical. Secular humanists and existentialists fall along similar lines. A transcendentalist or a romantic would tell you all men are essentially good and that THERE is something more. Someone of a certain faith will espouse their spiritual beliefs as true. There is truth to each of these philosophies yet not the whole truth. However, that is my opinion. Anyway one looks, there are many "truth's" (emphasis on the connotes)but maybe one of them is the absolute or none at all.
The Universe is one big perception. Like all things, it requires faith to believe it exists and there are things even scientists have to have faith in, for certainty of existence. Sure, it is right in front of us or at least, some of it. I accept it as real, I accept the science that tells me it is real. However, others may not.
Every individual has a world view and each one sees things differently. We agree on basic things, ex. that we breath and live. Yet all of us live in a realm of subjectivity.
What is right for you is wrong for another. What is another man's trash is a treasure to the next. Yet each individual and ostensibly, groups of people promote related or exact philosophies about one worldview. In essence, one truth. A devout Christian or Muslim would have you see his truth as the one truth, regardless if they tried to force you to believe it.
Thus when you make ontological enquiries and draw your own conclusions, bear in mind that if they do not fall into the realm of some form of proof (mathematical or physical), it is purely a matter of opinion. You will find things in life or in spirituality that you hold as true and immutable. Yet when you lay those standards down and present them to others, they will not be interpreted exactly the same. They may not even be listened to, in lieu of other "truth's".
Thus, ending exactly where I started: there is physical and spiritual or as I have elaborated, concrete and subjective. Science tells us that the very physical fiber that makes us is an amalgamation of cells and organic systems, ones that process physical resources and pollutants to make us! Yet the basic physical nature of us is chemical in origin. If you look further it goes to the atomic level of ions, protons, neutrons and electrons. Essentially, all we are is the physical and we cannot quantify anything else. Thus, scientifically, feelings are merely physical in origin. They have no place or basis in the intangible, merely our fancies.
However, that is merely scientifically. If you said any of the above paragraph to a man in the early first millenium, he would not even understand you. His world was explained by myth, faith, misconception and heresay. He did not have the microscope, telescope or scientific method. He had only superstition. Yet that was HIS reality and broadly considered the truth.
I am trying to say is what we cannot quantify scientifically, we must quantify with some kind of faith. In my case, I believe in an afterlife, I believe in a God (a loving and wise one - or at least not an evil one) and a spirit or soul of some kind. I believe that there is more to feelings than chemicals and that maybe the physical world is merely an illusion.
However, to go further in discussion about WHY there is more to feeling or existence (as in "IT'S A FACT JACK!"), is an interesting and stimulating but futile act. For, as I have said, everyone finds their own truth and draws their own conclusions. Yet that is just my opinion.
It is as if God or nature has given us no recourse but to have faith in something more, no matter what.
Edit:
Artificial is merely a term humans have manufactured to describe natural events created by man. Thus, artificial is natural and therefore not fake in any way.
There is no difference between "artificial emotions" and "real emotions". Both are caused by chemicals. If they were caused by the soul then that would not explain why drugs affect moods. However, nature has more or less perfected what man has only begun to do. If not regulated, using drugs to alter your mood can only result in some kind of negativity. Either through death or social and or physical damage to yourself and or others.
- Josh Lam, Highschool Student Extraordinaire