I sin everyday
He forsook Paul as in (2 Timothy 4:16 KJV); as in "dissembled", "carried away with their dissimulation" (Galatians 2:13 KJV) or "turned away from Paul" (2 Timothy 1:15 KJV). He departed unto Thessalonica (2 Timothy 4:10 KJV). Members of the Body of Christ are at risk for departing the faith by giving heed to seducing spirits and doctrines of devils (1 Timothy 4:1-2 KJV), but never will it cost us salvation (Ephesians 1:13-14 KJV), only reward (1 Corinthians 3:10-15 KJV, 2 Timothy 4:7 KJV). I protect myself by taking heed unto thyself, and unto the doctrine; continuing in them. In doing this I both save thyself, and them that hear thee (1 Timothy 4:16 KJV from the bad doctrine).
Departing the faith for those in the Body is not the same as falling away (Hebrews 6:4-6 KJV)! To believe they are the same is a classic case of failure to 2 Timothy 2:15 KJV!