What's the point of having "faith"?

What is the point of having "faith"?

Faith is meaningful because there is a possibility of mistake/failure or being mistaken/failed
If there is someone who is 100% guaranteed of never to make mistakes, or never to fail?
then, what's the point of having faith in him? --maybe it is not too special

But, if it's not that way, then when you have "faith" in someone who has a possibility to fail, you will be risking yourself.
The greater what is expected for him to fulfill, the greater your risk is

That's the faith God has had upon you
So, do not say so easily, "I have faith in God."
Think what kind of faith God has upon you
And say, "I have decided to own the faith which God has upon me."
Then, that "faith" will be something very meaningful