I just believe that since I am the one that sinned, and our Lord has paid in blood to accept the sin itself, I should be held fully accountable for my temporal penance.
Please ladies and gentlemen, help me to explore this and if I am wrong point it out to me how and why.
Purgatory is, as you know, a place of temporary punishment through which nearly all souls who die in the state of sanctifying grace must pass before entering heaven due to the vestiges of sin we have on our souls which we committed during our lives. Purgatory cleanses us of the vestiges or remnants of sin that our penances on earth were unable to cleanse.
Seems like you are confusing words here. "Temporal penance" is simply, "penance", which is something that we do here on earth because we cannot do it after death. Fasting is an example of a "temporal penance", although Catholics do not use that term, we simply say "penance." Fasting is a penance we perform here on earth for a few reasons, one of which is to help shorten our time, and/or the time of other souls in purgatory.
Here is a nice little pamphlet that will help,
Read me or Rue it. It is simply written and short, always a good combination. :)