Cessationism, in Christian theology, is the view that the charismatic gifts of the Holy Spirit were in effect only during the time between the coming of the Spirit on Pentecost c. 33 AD (see Acts 2) and the completion of the canon of Scripture. This view is usually justified by reference to 1 Corinthians 13:8-10, which reads "Love never fails. But whether there are prophecies, they will fail; whether there are tongues, they will cease; whether there is knowledge, it will vanish away. For we know in part and we prophesy in part. But when that which is perfect comes, that which is in part will be done away." The cessationist claim is that "that which is perfect" (or "complete," Greek "teleion") refers to the Bible. Opponents of cessationism, called charismatics, argue that verse 12 implies that "that which is perfect" refers to heaven, and not the Bible, so that this verse merely claims that gifts of prophecy, tongues, and knowledge will be unnecessary in heaven.