Faith is when you know something to be true. Whether it is from accumulations of experience, intuition, spiritual growth, love, insight, and more.. I believe it is a combination of all these.. When you know, you know... Trust is another subject all together. It must be earned. Trust definitely comes from experience.. Faith stays, once you have it.. There will always be a core inside.. Yes you can have faith in one thing and not another. No, you can not give someone faith. You can help them find inside themselves, but not give it to them. You can not buy faith. I do believe we are born with faith.