From which some having swerved have turned aside unto vain jangling;
From which - namely, from a pure heart, good conscience, and faith unfeigned, the well-spring of love.
Having swerved, х astocheesantes (G795)] - 'having missed the mark (the "end") to be aimed at;' namely, "love." Translated "erred," 1 Timothy 6:21; 2 Timothy 2:18. Instead of aiming right, and attaining "love," they "have turned aside (1 Timothy 5:15; 2 Timothy 4:4; Hebrews 12:13) unto vain-jangling" х mataiologian (G3150), 'vain talk]' about the law and genealogies (1 Timothy 1:7; Titus 1:10; Titus 3:9; 6:20). It is the greatest 'vanity' when divine things are not truthfully discussed (Romans 1:21) (Bengel).