Cum occasione

Cum occasione Apostolic constitution of Pope Innocent X
Signature date	31 maggio 1653
Subject	Condemned five propositions found in Cornelius Jansen's Augustinus as heretical

Cum occasione is an apostolic constitution in the form of a papal bull promulgated by Pope Innocent X in 1653 which condemned five propositions said to have been found in Cornelius Jansen's Augustinus as heretical.^[1]

The five errors of Jansen on Grace condemned in Cum occasione are:

1. "Some of God's commandments are impossible to just men who wish and strive to keep them, considering the powers they actually have; the grace by which these precepts may become possible is also wanting to them."^[2][a]
2. "In the state of fallen nature no one ever resists interior grace."^[2][3]
3. "In order to merit or demerit, in the state of fallen nature, we must be free from all external constraint, but not from interior necessity."^[4][b]
4. "The Semi-Pelagians admitted the necessity of interior preventing grace for all acts,^[c] even for the beginning of faith; but they fell into heresy in pretending that this grace is such that man may either follow or resist it."^[4][d]
5. "It is Semi-Pelagian to say that Christ died or shed His blood for all men."^[4][e]

Bernard Otten explained, in A manual of the history of dogmas, that the first four of these propositions are absolutely condemned as heretical; while the fifth is condemned as heretical when taken in the sense that Christ died only for the predestined.^[4]

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