Jesus first said, “Go” (Mt 28:19), then in v.20 He announced: I am with you all the days (perpetually, uniformly, and on every occasion), to the [very] close and consummation of the age. We have a future that is guaranteed by our commissioning. We are commissioned to continue going until the very close and consummation of the age. There is, therefore, no let up and no decrease. Our Lord said “Go” but has not said, “Come back.” We will speak the language of commissioned ones. We will continue to go into the geographical spheres and to people groups where He gives us power of influence, and we will continue to go into the future with preparation and expectancy.
…He [God] Himself has said, I will not in any way fail you nor give you up nor leave you without support. [I will] not, [I will] not, [I will] not in any degree leave you helpless nor forsake nor let [you] down (relax My hold on you)! [Assuredly not!] 6 So we take comfort and are encouraged and confidently and boldly say, The Lord is my Helper; I will not be seized with alarm [I will not fear or dread or be terrified]. What can man do to me? (Heb 13:5-6)