Have You Ever Heard The Term The Proof Is In The ...

Have you ever heard the term the proof is in the pudding? It actually comes from the phrase "the proof of the pudding is in the eating." It means that the true value or quality of something can only be judged when it’s put to use. The meaning is often summed up as "results are what count." (From ASK Yahoo)

When Paul uses the term faith here it is not some vague idea. Faith equals results.