Philippians 1:5

For your fellowship in the gospel from the first day until now;

Cause for his 'thanking God' (as marks the object on which his thanks rest, and when he gives thanks).

For your fellowship (i:e., real spiritual participation) in (literally, 'in regard to,' or 'into:' Greek, )

The gospel from the first day (of your becoming partakers in it) until now (; ). Believers have the Gospel fellowship of the Son () and of the Father (), by becoming partakers of "the fellowship of the Holy Spirit" (), and exercise it by acts of communion, not only the Lord's supper, but holy liberality to brethren and ministers (; , "communicated with me, as concerning giving;" ; ; ).