en_tn_condensed/1ti/01/15.md

This message is reliable

"This statement is true"

worthy of all acceptance

"we should receive it without any doubt"

sinners, of whom I am chief

"sinners, of whom I am the chief sinner" or "sinners, of whom I am the worst." Paul is saying that he has sinned more than any other sinner, not that he has been the leader of a group of sinners.