Jr. Every good lifter knows of and accepts the idea that progression is the key to getting stronger.
Progression can be in the form of more weight or more reps, or, both.
While we all know that being able to do more reps means that we are stronger, it's the increase in weight that brings a smile. It's the increase in weight that demonstrates improved strength. Typically, regardless of where we start out, we reach a point where it seems impossible to make that next 5 or 2 -pound jump. If you are at your maximum potential, you may not be worried about trying to add more weight. Chances are pretty good that you are not so close to your maximum potential that you are willing to stop trying to add weight.