Brian said, "Can anyone here help me focus on what should be my main arguments? Any good websites I should look at?"
If I were going to write a book I wouldn't necessarily first look at what other people have to say on the topic. I would first come up with my own ideas through scrutiny and deliberation, and then look at what others have written - if it's not that different it probably isn't going to be all that necessary to write a book. Like the adage "if we always agree one of us is not necessary."
I wrote my opinion that proof is a criterion that differentiates knowledge from belief. There are many different opinions on any subject - nobody has to agree with any of them unless they think they have proven their point. I read things all the time that I don't agree with. Some people think that there is a difference in belief and justified belief - but I don't. A belief may be justified and still be wrong. Something that is not a proven fact is not knowledge. I gave a brief outline and suggested a few changes in definitions - since I would expect that a person writing a book would want to investigate the subjects for themselves and come to their own conclusions.
I never think that anything is a fact until there is sufficient proof that I can examine for myself. Those who are in the "know" give us information all the time, but I don't necessarily believe that they do know. There are assertions by all kinds of people - that belief in god makes people more moral, happier etc., but some studies that were done came up with different findings. Danes and the Swedes are probably the most godless people on Earth- they don't believe in god, heaven or hell. They're nice to one another; their country has famously expansive welfare and health care services. They have a strong commitment to social equality and they murder and rape one another significantly less often than Americans do. This is not what we are lead to believe is true.
The term spiritual has also been debated. Some people say "it doesn't mean religious" but it does refer to anything outside or beyond the human level. I think they need to prove that "thing" exists because I think giving credit for human achievements to something spiritual diminishes the incredible things that humans can do and undermines their achievements. I have concluded that the very definition of knowledge is distinguishing between belief and facts.
Not all that long ago everyone believed that the earth was flat and was the center of the universe.
Galileo was an Italian mathematician and physicist who improved the telescope. The telescope could only magnify objects three times. Galileo created a telescope that could magnify objects numerous times. Galileo was able to look at the moon, discovered the satellites of Jupiter, observe a supernova, verify the phases of Venus, and discover sunspots. Galileo's discoveries proved the Copernican system (the earth and other planets revolve around the sun.) Knowledge is also a perception of a truth or fact. Before the Copernican system, it was believed that the Universe was geocentric (the sun revolved around the earth.) If there is no evidence for something there should be no belief concerning it. Galileo took his telescope to Rome, but in 1616, Galileo's solar system theory was denounced and banned. Galileo had evidence and the Church had belief. Galileo's discoveries were perceived to jeopardize the Church and the Catholic faith, and he was cautioned by the Church not to pursue this (give it up because it's sacrilegious.) The Church taught that the word of God placed the earth in the middle of the universe, and therefore the sun rotated around the earth, and this is what people believed. If Galileo kept on with what he had discovered it would be hazardous to the Church because the Church could lose its credibility. A false belief is not considered to be knowledge - even the sincere ones.
A belief is only knowledge if the belief is true; a belief is not true until it is a proven fact, and then it is knowledge. I never use the term I believe to say that something is a fact - I say it is a fact that I know. Elimination of disturbing facts may be common in religion, but it is not the path to knowledge. A fact that nobody believes is not common knowledge, but there is someone who knows. Everyone knows that in Galileo's day new knowledge was difficult to disclose if it went against god or what everyone believed. What they don't admit is that it's not that different today.
Belief is consent to anything proposed by reason of the authority, and is accepted as fact, apart from personal knowledge or tangible evidence on (faith) or conviction. Galileo was tried by the Church, forced to recant all of his scientific findings, placed under house arrest and put into prison. I think he agreed to give up science for religion and they eventually let him out.
Galileo was never declared innocent of a crime, but the Catholic Church did reverse the 1616 proclamation that his theory should be banned. The pope simply said that Galileo was unjustly treated because the Church back then confused science and faith. If you have evidence you don't need belief.