This morning the very first sentence seems to have retreated into the fog. After working with it in detail this morning it sort of makes sense but it isn't perfectly lucid.
Right from the first word the author launches with Ἡ ... γνῶσις with περὶ τῆς θεοσεβείας καὶ τῆς τῶν ὅλων ἀληθείας in the gap between the article and the noun. I am used to that now. The rest of the sentence presents other challenges. The postponing of the finite verb is also something very common but it still bothers me to have all the arguments stacked in front waiting for a verb to show up. There are also idioms used in a manner that I not familiar with, μόνον ... οὐχὶ for example.§ 1.1 Ἡ μὲν περὶ τῆς θεοσεβείας καὶ τῆς τῶν ὅλων ἀληθείας γνῶσις οὐ τοσοῦτον τῆς παρὰ τῶν ἀνθρώπων διδασκαλίας δεῖται, ὅσον ἀφ' ἑαυτῆς ἔχει τὸ γνώριμον· μόνον γὰρ οὐχὶ καθ' ἡμέραν τοῖς ἔργοις κέκραγε, καὶ ἡλίου λαμπρότερον ἑαυτὴν διὰ τῆς Χριστοῦ διδασκαλίας ἐπιδείκνυται·
§ 1.1 The knowledge of our religion and of the truth of things is independently manifest rather than in need of human teachers, for almost day by day it asserts itself by facts, and manifests itself brighter than the sun by the doctrine of Christ. Trans. A. Robertson ?