Phil. 1:1-2 Bondservants, Grace, and Peace.
Paul has Timothy to bear witness with him as he wrote to the saints, that is all members of the church, but especially her leadership – the bishops or overseers and deacons (v. 1 cf. I Tim. 3:1-13), although Paul was also an apostle, in addition to being a brother (II Cor. 1:1a; Col. 1:1). Both were present at the founding of the Philippian church (Acts 16), both being known to them (2:2). Rather than think that Paul left out elders or presbyters, the evidence in the rest of scripture equates bishops with elders, the latter denoting a different type of service, but the two of each man (cf. Acts 20:17, 28; Titus 1:5-9). Peter also regarded the two titles as signifying the same persons, and he adds that they are fellow witnesses, and fellow under-shepherds of ‘the Great Shepherd’ of His flock, all partaking of the glory yet to be revealed (I Pet. 5:1-4). The same holds for being ‘bondservants’. Please note, grace comes first then peace, and both come from both “God our Father and the Lord Jesus Christ.” (v. 2 cf. Rom. 1:7; I Cor. 1:3; II Cor. 1:1b).