He says that the gates of hell will not prevail against the church. (redeeminggod.com)
000 — Many practice «natural family planning» however, if a Catholic chooses to use birth control it does go against church teachings. (religion.blogs.cnn.com)
It is certainly possible for someone to, in good conscience do something against church teaching, but it is something that should happen extremely rarely. (relevantmagazine.com)