1 Simon Peter, a bond-servant and apostle of Jesus Christ, To those who have received a faith of the same kind as ours, by the righteousness of our God and Savior, Jesus Christ: 2 Grace and peace be multiplied to you in the knowledge of God and of Jesus our Lord; 3 seeing that His divine power has granted to us everything pertaining to life and godliness, through the true knowledge of Him who called us by His own glory and excellence. 2 Peter 1:1-11 (NASB) (Read verses 4-11 on the site)
What is this godliness that Peter referred to in v3 (above)? The word godliness in v3 translates the Greek noun εὐσέβειαν (eusebeian) which is the accusative, singular, feminine case of εὐσέβεια (eusebeia). This word is used in the N.T. To refer to a particular manner of life in which the believer is devoted to God. In 1 Timothy 4:7, for instance, Paul exhorts believers to train themselves for “godliness” even to the extent that it requires a strenuous pursuit (6:11). Of course, the goal of such training is far more valuable than physical training (4:8).