The, er…rocky, but fruitful relationship between Husserl and Heidegger is well known. I was skimming through Psychological and Transcendental Phenomenology and the Confrontation with Heidegger this afternoon and I came across this passage in a fiery letter Heidegger wrote to Karl Lowith in 1923:
In the final hours of the seminar, I publicaly burned and destroyed the Ideas to such an extent that I dare say that the essential foundations for the whole of my work are now clearly laid out. Looking back from this vantage point to the Logical Investigations, I am now convinced that Husserl was never a philosopher; not even for one second in his life. He becomes ever more ludicrous.
And that’s actually pretty tame. I can’t remember where it is or where I read it, but I think in a letter to Jaspers or another letter to Lowith Heidegger pretty much says something like “Husserl has totally gone off the deep end,” and goes onto accuse Husserl of being impressed with himself for founding phenomenology. Nothing like a little hostility…
Though one need only to look at Husserl’s marginal notes in his copy of SZ to get wind of his rather unethusiastic reaction. I think it was there that Husserl characterized Heidegger’s work as either irrational or at best, a superficial continuation of his own work. Throughout the PTP (cited above) one can find a number of Husserl’s comments regarding Heidegger’s attacks on him as well as Heidegger’s work.