By which also ye are saved, if ye keep in memory what I preached unto you, unless ye have believed in vain.
For our gospel came not unto you in word only, but also in power, and in the Holy Ghost, and in much assurance; as ye know what manner of men we were among you for your sake.
For they themselves shew of us what manner of entering in we had unto you, and how ye turned to God from idols to serve the living and true God;