As were the hearts of the first human beings, so down through the ages again and again human hearts have been struck by the divine ray. Hidden from the whole world, it illuminated and irradiated them, let the hard, encrusted, misshapen matter of these hearts soften, and then with the tender hand of an artist formed them anew into the image of God. Seen by no human eye, this is how living building blocks were and are formed and brought together into a Church first of all invisible. However, the visible Church grows out of this invisible one in ever new, divine deeds and revelations which shed their light in ever new epiphanies. The silent working of the Holy Spirit in the depths of the soul made the patriarchs into friends of God. However, when they came to the point of allowing themselves to be used as his pliant instruments, he established them in an external visible efficacy as bearers of historical development, and awakened from among them his chosen people.
[Edith Stein, "The Hidden Life and Epiphany", The Hidden Life, Collected Works of Edith Stein (Volume IV), ed. Dr. L. Gelber and Michael Linssen, O.C.D, ICS, 1992.]