²⁶ His voice shook the earth at that time, but now He has promised, Yet once more I will shake not only the earth but also heaven.^{(A)[a] 27} This expression, “Yet once more,” indicates the removal of what can be shaken^(B)—that is, created things—so that what is not shaken might remain. ²⁸ Therefore, since we are receiving a kingdom that cannot be shaken, let us hold on to grace.^[b] By it, we may serve God acceptably, with reverence and awe,^(C)