God is faithful for He fulfills what He says; what He starts He has the ability to complete, for “The Lord is faithful to all His promises” (Gen 21:1; Num 23:19; 2 Chr 6:4,14,15; Ps 145:13; 1 Cor 1:9; Phil 1:6, 2:12,13). "Jesus Christ is the same yesterday, today and forever" (Heb 13:8). It is for us to continue to co-operate with God so His purposes for us are outworked. We can commit all the concerns of our life to Him because He loved us enough to die in our place.
Being considered trustworthy is conditional on past performance, with integrity and character only proven over time (Lk 16:10,11, 19:17). Paul did not excuse himself from his divine mission to share Christ when it was costly; he kept right on and later said, “God considered me faithful” (Act 9:15,16; 2 Cor 11:23-30; 1 Tim 1:12). Could that be said about me? Am I trustworthy; can others rely on me keeping my word and not gossiping (Deut 23:23; Prov 11:13)? While employees should be trustworthy when working for an earthly boss (otherwise the business won’t thrive) they are ultimately also serving the Lord (Col 3:22-24; Tit 2:9,10).