This document discusses the sin of blasphemy from a Christian perspective. It provides several definitions of blasphemy, including speaking against God or bringing divine things into disrepute. The document notes that blasphemy is considered a very serious sin in the Bible, with some forms described as unforgivable. It discusses how blasphemy can occur through one's words or actions, and provides numerous biblical examples where people were accused of or warned against blasphemy. The document emphasizes that blasphemy dishonors God and causes His name to be profaned.