He is God, therefore He acts like God.
However, Christ does all things for man.
He joins Himself to man by becoming flesh.
He is the Mystery of Godliness.
He becomes one of us, therefore He can be our Representative.
His Life, His Work, His Death, Burial, Resurrection and Ascension, and His Present Position, and Work in Heaven are all representative in nature.
And hence the Testimony of Jesus Christ includes His relationship with man in whatever He Represents both now and before.