Even in high school I had a lot of interest in Philosophy. But what philosophy was in those days did not seem very inspiring. mainly it consisted of word analysis and the claim that there are no values nor truth. [The Eastern religions that were popular did not seem to have much going for them. That is how it seemed to me.] So I gravitated towards more ancient philosophies like Plato, Spinoza, and Chinese philosophy. Kant and Hegel were no where to be found. Not in the public library nor in the high school library nor even in book stores! Those were the days of existentialism. It all seemed vacant of any content or meaning. [John Searle said rightly about most of twentieth century philosophy "It is obviously false". I could not agree more.]
So instead of Philosophy I went to Shar Yashuv and then later on the Mir and decided to put philosophy on hold. Eventually I picked up Spinoza again and in Brooklyn public Library I found an edition of the Cambridge Hegel. That is some of his major writings along with rigorous commentary.
At some point after going through the pre_Kantian thinkers I got to the point of realizing that Kant and Hegel are important. And that you can not just go back to business as usual in philosophy as if they were never around.
[This idea of the importance of the Kantians came after seeing a good deal of the pre Kant people that had some great points but also had problems. Just take a look at Leibiniz, Thomas Reid, Hume and you will see what I mean. I got the idea that Kant is important. What school of Kant? Reinhold, Maimon, Shultze, Fries. Or the Shopenhaur or even later Marburg or Leonard Nelson?
For along time I have had the idea that you have to take all the Neo Kantian as a collective whole. It is hard to point to any one in particular as having all the truth..]
[Even though in the Guide of the Rambam, he does say that the Metaphysics of the Greeks is important, my feeling is that tis would have to apply to Kant also.]
It is not that I am unconserned about Bitul Torah. Rather that from the Rambam and Ibn Pakuda I would have to say that Metaphysics and Physics are a part of Torah