Christian "faith" vs. plain "faith"

[watchamadoodle]

All you've done is repeat over and over again "Believe and you'll believe."

If you lift weights you'll get stronger. Don't believe me? Try it.

That seems sensible as long as a person is allowed to give up if it doesn't work.
Typically the believers say to the disappointed person that he/she needs to be patient, try harder, be more sincere, etc. The believers are unwilling to accept that the prescription doesn't always work.

But I agree with the idea of trying things and basing your faith/confidence on subjective personal results. It's not as good as objective scientific results, but it's better than nothing. Subjective results could give a much lower confidence that might justify certain actions with high potential returns?