That we are able to know God truly rests on the fact that God has made us in His own image, thus an impression of Himself, albeit from the greatest distance. Because we ourselves are spirit, possess a mind, will, etc., we know what it means when in His Word God ascribes these things to Himself.

Geerhardus Vos, Reformed Dogmatics, trans. & ed. Richard B. Gaffin Jr., 12.