True Christianity #315
315. In the heavenly meaning, "committing adultery" refers to denying the Word's holiness and desecrating the Word. This meaning follows from the spiritual meaning, which is contaminating the good things in the Word and falsifying its truths. People who in their heart laugh at everything having to do with the church and religion are people who deny the Word's holiness and desecrate the Word - in the Christian world every aspect of the church and religion comes from the Word.