“Accordingly, at the beginning when the first promise of salvation was given to Adam (Gen. 3:15) it glowed like a feeble spark. Then, as it was added to, the light grew in fullness, breaking forth increasingly and shedding its radiance more widely. At last-when all the clouds were dispersed-Christ, the Sun of Righteousness, fully illumined the whole earth (cf. Mal., ch. 4).”– John Calvin, Institutes of the Christian Religion, Book 2, Chapter 10, Section 20.
It is difficult to hope. But He will come back. Full illumination is coming again.