Pope Alexander VII issues a statement condemning Jansenism which Jansenists are required to adopt.
From the Constitution,"Regiminis apostolicis":
"I, N., submit to the apostolic Constitution of Innocent X, dated May 31, 1653, and to the Constitution of Alexander VII, dated October 16, 1656, Supreme Pontiffs, and I reject and condemn with a sincere heart, just as the Apostolic See has condemned them by the said Constitutions, the five propositions taken from the book of Cornelius Jansen, entitled Augustinus, and in the sense understood by that same author, and so I swear:
So help me God, and this holy gospel of God."
Jansenism is a Roman Catholic group named after Cornelius Jansen (1585-1638), Bishop of Ypres. It owes a lot to the theology of John Calvin and is characterized by moral severity.
Jansenists derive their position on grace from Augustine, without modification, and believe in the total sinfulness of humanity, predestination, and the need for Christians to rely upon a faith in God which cannot be validated through human reason.