The great and the invincible

Every time a man realizes his mistake, and people forgive him for that and take him in again, he becomes great by way of imparting his knowledge to them of how not to commit that mistake again. His experience is their teacher, and in that, he becomes their teacher! But, every time a man realizes his mistake, and people don't forgive him for that nor take him in again, and still he goes about imparting that knowledge to the very unforgiving lot, he becomes invincible. For, in the former, his greatness is a result of the debt paid more than full to the others' forgiveness, but in the latter, his invincibility is a result of a debt that does not exist but is still paid to even the unforgiving.

Now, isn't that a justification good enough to keep committing new mistakes?!