“We ought constantly to remember, ourselves, and to remind our brethren that the time is short (Hebrews 10:37). This is specially needful on two classes of occasions very different from each other: first, when we are in danger of being led astray by prosperity; secondly, when we are in peril of undue depression from afflictions. The latter only is here mentioned, but both of them are stated by the apostle in 1 Cor. 7: 29-31.
Often deliverance is just before day. And God has so arranged the affairs of his church that there always has been and to the end of the world, there always will be, a coming of Christ before his people–a coming to which they may look with holy confidence and joy. But let them take heed that they abuse not the doctrine to vagaries, nor, on the other hand forget it, Luke 21:34-36. For every coming of Christ there has been and is a fixed time. Nothing can postpone it. It will not tarry, Hab. 2:3″
–William S. Plumer “Hebrews” p. 436