Without faith it is impossible to please God. That is what the book of Hebrews says. Faith is the substance of things hope for and the evidence of things not seen. There is substance and evidence to our faith. It is not blind in the least bit.
What we believe is vitally important to our way of life. What we digest on a regular basis will produce the person that we are. The old saying we all learn in school "you are what you eat" is more true than we would like to believe.
What we say will come from what we believe. It matters what we say, about ourselves, others, and/or our circumstances. Negative people will suck the very life out of you.
What we do will stem mostly from what we say which funnels down from what we believe. If we are a people of faith then we should act accordingly. If God says something, then just as the men and women of ancient days acted on that word, we should do the same but actually with more faith than they.
As we do these thing we start becoming the people of faith that God has destined for us to be.