The way I look at faith is simply in the form of optimism. As gay as it sounds, faith is what motivates me to every morning wake up and smile even if it is the shittiest day of my life. Ask anyone that knows me, I don't stay mad or depressed long. I believe that everyone has a gap in their life that some people fill with religion, some people fill with hope, some people fill with spite, etc. Faith is necessary in human emotional structure. Now this doesn't mean that everyone prays as a form of faith. For me, faith is a reward. Striving and looking up above where I am instead of below has always brought me good fortune. I don't sit there and ask some holy man in the sky for it. The sooner we can embrace faith as something separate from religion, the sooner we can realize its true power.
Hope this helps.