What Is the Unforgiveable Sin? Basic Sam Storms The Lord Jesus in Mark 3 speaks about the unforgiveable sin. This article considers in detail just what this sin against the Holy Spirit is. Source: Sam Storms, 2015. 11 pages.Read article Add new comment Your name Subject Comment * More information about text formatsPlain textNo HTML tags allowed.Web page addresses and e-mail addresses turn into links automatically.Lines and paragraphs break automatically.