According to 2 Cor 3:5-6, God has made us ministers of the New Testament, or of the new covenant (the word “covenant” is translated from the Greek word, “diatheke,” and is translated as either “testament” or “covenant.”).
Come unto me, all ye that labour and are heavy laden, and I will give you rest. (29) Take my yoke upon you, and learn of me; for I am meek and lowly in heart: and ye shall find rest unto your souls. (30) For my yoke is easy, and my burden is light. (Mat 11:28-30)