Mateus 12

31 Therefore I say to you, every sin and blasphemy will be forgiven people, but the blasphemy against the Spirit will not be forgiven people. 32 And whoever speaks a word against the Son of the Man, it will be forgiven him;*Statements like this need to be interpreted against the background of all other Scriptures that bear on the subject. Forgiveness depends on confession (1 John 1:9). but whoever speaks against the Holy Spirit, it will not be forgiven him, neither in the present age nor in the next.*Mark 3:30 makes clear that "the blasphemy against the Spirit" is to ascribe His working to Satan.