Expositor's Bible Commentary Commentary 2 Timothy 1:5

"having been reminded of the unfeigned faith that is in thee; which dwelt first in thy grandmother Lois, and thy mother Eunice; and, I am persuaded, in thee also." — 2 Timothy 1:5 (ASV)

Some external occasion, perhaps a message from Timothy, had brought his faith to Paul’s remembrance. That faith was genuine and “sincere” (lit., “unhypocritical”; GK 537). As this verse testifies, Timothy had a godly mother and grandmother.