God is faithful, by whom you were called into the fellowship of His Son, Jesus Christ our Lord. (1 Corinthians 1:9, NKJV)
The faithfulness of God is the Christian’s ground of confidence. He will do what He has promised. 1) God is faithful to call us into the fellowship of His Son, Jesus Christ. The gospel calls us into salvation as new creatures in Christ (1 Cor. 1:18, 24; 2 Cor. 5:17; Gal. 3:26-27; 2 Thess. 2:13-14). We are confident in the promised fellowship we have with the Father and the Son when we love Christ and keep His word (John 14:23). 2) God is faithful to shield us and give us a way of escape when we are tempted to sin (1 Cor. 10:13). We are confident that, though tempted, we can endure it successfully. 3) God is faithful to preserve us blameless at the coming of the Lord Jesus Christ (1 Thess. 5:23-24). Christians are saints, set apart to the holy service of God (1 Cor. 1:2; 1 Pet. 2:5, 9). We are confident that when we walk in the light, we will be blameless at the Lord’s return (1 Jno. 1:5-9). God faithfully accomplishes what He promises. Our confidence is in Him (Rom. 8:35-37). Let us be ever faithful and true to Him (Rev. 17:14).