It is human nature to try and understand our surroundings and in some way contribute to them, either to further our own existence or to help others in some way. Human curiosity is, I think, one of our most powerful attributes - the eternal need to search for more knowledge and to better understand our place in our environment. Now, that's the basis for science, as what science is constantly trying to do is discover how, why, when, and where things exist.
In order to even begin to discuss the idea of faith and what it means, we have to define it totally and definitively. The English word of faith just means you have a strong conviction, one way or the other, on a particular idea/person/entity. A more realistic understanding of the word and the idea that it represents, at least currently, is similar but is more specific. Faith is the belief in a concept that has zero proof at all.
