ORIGINAL SIN. We therefore acknowledge that there is original sin in all men.
ACTUAL SINS. We acknowledge that all other sins which arise from it are called and truly are sins, no matter by what name they may be called, whether mortal, venial or that which is said to be the sin against the Holy Spirit which is never forgiven (Mark 3:29; I John 5:16). We also confess that sins are not equal; although they arise from the same fountain of corruption and unbelief, some are more serious than others. As the Lord said, it will be more tolerable for Sodom than for the city that rejects the word of the Gospel (Matt. 10:14 f.; 11:20 ff.).
THE SECTS. We therefore condemn all who have taught contrary to this, especially Pelagius and all Pelagians, together with the Jovinians who, with the Stoics, regard all sins as equal. In this whole matter we agree with St. Augustine who derived and defended his view from Holy Scriptures. Moreover, we condemn Florinus and Blastus, against whom Irenaeus wrote, and all who make God the author of sin.
-from The Second Helvetic Confession (1564), Chapter 8