1 Learn from Nietzsche and Heidegger to that Plato and Aristotle need to be taken with deadly seriousness
2 Learn from Plato and Aristotle that they are fundamentally sounder than Nietzsche or Heidegger.
Nietzsche and Heidegger are near the leve
That is what Nietzsche and Heidegger lead us to: χειμασθεὶς ὑπὸ ταραχῆς διαλυθεὶς εἰς τὸν τῆς ἀνομοιότητος ἄπειρον ὄντα πόντον δύῃ.