Christian "faith" vs. plain "faith"

[KevinM1]

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.

The analogy isn't apt, anyway. Belief is not a tangible thing, and anything attributed to faith can just as easily (and more believably) be attributed to something more mundane. It is entirely unlike lifting weights, or practicing math (which has these pesky little things called rules that can be followed and existing results with which to compare), or anything else where repetition can increase performance.