“When the fullness of time was come” God began the Christian Age through His Son, Jesus Christ (Gal. 4:4-5; Eph. 1:9-10). In future articles we will study more about Christ’s work to fulfill God plan. Suffice it to say, at this time, that Christ, through His teachings, life, death, and resurrection became “the mediator of the new testament” and began the new age prophesied by Jeremiah (Jer. 31:31-34; Heb. 8:6-13; 9:15).