If you sin, it is not because you are under any compulsion to sin, but because of your misuse of your free-will. Besides, it must be remembered that to commit sin and then to lay the blame on the weakness of your nature is really to lay the blame on God, who gave men this nature. God commands nothing impossible. It is sheer profanity to say that God has laid certain duties upon us and at the same time has given us a nature incapable of performing them. We are never held accountable for what we are not the author of.
Ability is always the measure of responsibility.
God has given us the ability to direct our lives, either according to intelligence in recognition of our obligation to God and to our fellow men, or according to selfishness and unintelligence in the supreme seeking of our own happiness. By examining both of the above statements, we could arrive at the same conclusions. Pelagianism has gone through such examination since its inception in the fifth century. When Pelagius was in Rome he met and became friends with a certain Caelestius. Caelestius agreed with and propagated the views of Pelagius which led to the council of Carthage in the year 412.