For me, faith is several things but most of all faith is manifested in, and measured by, trust. Trust in absolutely everything I know about God, His character and His promises. Trust in spite of all the problems and rotten things that happen. My trust has waxed and waned over the years with more waning than waxing. But that's really not smart; in fact just plain stupid. I know the truth and I know I can trust God 100%. Just do it, dummie.