What is the meaning of 2 Timothy 1:3?

I thank God, whom I serve from [my] forefathers with pure conscience, that without ceasing I have remembrance of thee in my prayers night and day; (2Timothy 1:3 KJV)

I thank God, whom I serve from my forefathers in a pure conscience, how unceasing is my remembrance of thee in my supplications, night and day (2Timothy 1:3 ASV)

I am thankful to God, whom I serve from [my] forefathers with pure conscience, how unceasingly I have the remembrance of thee in my supplications night and day, (2Timothy 1:3 DBY)

I thank God, whom I serve as my forefathers did, with a pure conscience. How unceasing is my memory of you in my petitions, night and day (2Timothy 1:3 WEB)

I am thankful to God, whom I serve from progenitors in a pure conscience, that unceasingly I have remembrance concerning thee in my supplications night and day, (2Timothy 1:3 YLT)

Interlinear

2Ti 1:3 I thank /echo/ /charis/ God /theos/, whom /hos/ I serve /latreuo/ from /apo/ my forefathers /progonos/ with /en/ pure /katharos/ conscience /suneidesis/, that /hos/ without ceasing [adialeiptos] I have /echo/ remembrance /mneia/ of /peri/ thee /sou/ in /en/ my /mou/ prayers /deesis/ night /nux/ and /kai/ day /hemera/;

Albert Barnes’ Commentary

2 Timothy 1:3 2Ti 1:3

Verse 3. I thank God, whom I serve from my forefathers. Paul reckoned among his forefathers the patriarchs and the holy men of former times, as being of the same nation with himself; though it may be that he also included his more immediate ancestors, who, for anything known to the contrary, may have been distinguished examples of piety. His own parents, it is certain, took care that he should be trained up in the ways of religion. Comp. See Barnes for Php 3:4, See Barnes for Php 3:5; See Barnes for Ac 26:4; See Barnes for Ac 26:5. The phrase “from my forefathers,” probably means, after the example of my ancestors. He worshipped the same God; he held substantially the same truths; he had the same hope of the resurrection and of immortality; he trusted to the same Saviour having come, on whom they relied as about to come. His was not, therefore, a different religion from theirs; it was the same religion carried out and perfected. The religion of the Old Testament and the New is essentially the same. See Barnes for Ac 23:6.

With pure conscience. See Barnes for Ac 23:1.

That without ceasing. Comp. See Barnes for Ro 12:12.

I have remembrance of thee in my prayers night and day. See Barnes for Php 1:3, See Barnes for 2Ti 1:4.

{c} “serve” Ac 23:1
{*} “from my forefathers” “After”
{d} “pure conscience” Heb 13:18