Bible Verses About Steadfastness: In striving for the faith of the gospel

Only worthily of the good news of the Christ conduct ye yourselves, that, whether having come and seen you, whether being absent I may hear of the things concerning you, that ye stand fast in one spirit, with one soul, striving together for the faith of the good news,

Beloved, all diligence using to write to you concerning the common salvation, I had necessity to write to you, exhorting to agonize for the faith once delivered to the saints,