Intillectually I don't believe in a god or goddess but spiritually I do since I find myself often talking to
something, usually if something isn't going as planned
.
Over the years I've to come agree with the idea of balance; not in the western view of something being equal to another but like the eastern philosophy of duality. More specifically, the Tao or the Way, although I don't fully comprehend it all. I see this duality in a lot of things: light/dark, male/female, right/wrong, good/evil, left/right etc. If you're a "scientist" you could say this is like the conservation of mass/energy: as one goes up the other goes down. One interesting observation is poverty: few people in our world are very rich while scores of others live in poverty. This duality is embraced by a oneness often described as the Way or Tao. We can see things that exist on a scale from one to the other (eg: somethings are right or wrong but others are seen in shades of grey).
Each thing (dog, cat, person, rock) has a Way that is different from all others. The combination of all Ways would be Truth. That being said one important paraphrase in the Tao Te Ching is "The Way (Tao) that can be name is not the true Way (Tao)". This phrase points to the observation that all things change: stone turns to dust, light turns to dark, wet turns to dry.
Religion is a great but flawed concept. It allows people of like beliefs to form a community and rely on eachother. It is a way to share ideas in an easily accessible method. It provides order in times when chaos seems rampant. However, it can also be used as a method to manipulate others. Not by god/goddess, mind you, but by other people bent on personal gain. It can be used to cause violence and pain while absolving the participants of responsibility. It is ultimately human.
Faith on the otherhand needs no religion. It is based on what we've observed in the past. I have faith that this message will be posted. I have faith that my car will start. We have faith that our scientific laws are true.
Another interesting observation about God (and this time I'm talking about the Judeo-Christian God) is that it has evolved over time. At first it was vengeful and would smite you for eating the wrong kind of food or not sacrficing a goat. Now, not so much. Some of my religious friends believe that God is treating us as parents treat their children as they grow. First the kid doesn't know very much so you give them rules to stop them when they do something that could harm them. Next they get into their teen years where they rebel and so you let them push away for a bit. Later in life the kids come to see that their parents were right afterall and then they come back. Humanity is in it's teen years.
Will science replace religion? Many scientific disciplines are religion. They give rigid practices that must be followed. You may only call yourself a follower of that science if you adhere to those practices. Ideas that are not approved by the "administrators" of those disciplines are often denounced as heretical or nonsensical. Questioning the practices can result in being shunned from the discipline.