Faith is one of those things that is hard to explain to those who don’t have it. This is partly because you don’t just “have” it or possess it like a trophy. Faith is an exercise, something you practice and decide on, and it doesn’t come from our human nature - which means it doesn’t come naturally. Doubts DO come naturally. People of faith still have doubts, they exercise their faith to overcome those doubts to pursue God and will and purpose.
God’s will and purpose are your purpose when you live by faith. Faith isn’t passive either! It’s active and a visible lifestyle that moves forward even when it experiences a setback. Faith > Fear!