κατά μὲν γὰρ τὸ ἰσχυρὸν Ἕλληνας ὁμοφρονέοντας, οἵ περ καὶ πάρος ταὐτὰ ἐγίνωσκον, χαλεπὰ εἶναι περιγίνεσθαι καὶ ἅπασι ἀνθρώποισι.
(http://www.perseus.tufts.edu/hopper/tex ... ection%3D2)
Would you please translate the sentence above closely? though I refer to several English tranlations and get the proper meaning, I can't catch it by the grammer. My questions are: 1) what does ταυτά εγίνωσκον mean literally? 2) the whole is an infinitive phrase, not a complete and independent sentence--is that a normal expression?
Thanks a lot!!!