The Gra explained that every word of Torah is worth as much as all the other commandments put together. He brings this from the Yerushalmi.The Yerushalmi says the mishna תלמוד תורה כנגד כולם refers to every word of Torah.

[You can ask if the same idea applies to Mathematics and Physics according to the opinions that Math and Physics are included in the commandment to learn Torah. See Rambam laws of Learning Torah where he divides the learning time into the Oral Written Law and Gemara and adds the things called Pardes are included in Gemara. We see  in the beginning of the Mishna Torah that Pardes refers to the subjects of Physics and Metaphysics. And in the Guide he says so openly in the introduction

But this group of Rishonim [Ibn Pakuda, Binyamin the Doctors, Rambam etc] include Metaphysics and I do not know what that would mean for today. In their time this meant Plato Aristotle Plotinus. Al Kindi, and Ibn Rushd. But today? I guess this would include Kant, Fries, Hegel, Leonard Nelson. 

[The main thing in Torah and Metaphysics is to know what to exclude. In philosophy I would exclude everything after Kant, Fries and Hegel. In Torah I would exclude everything after the end of the Talmudic period --as the Gemara says itself "Ravina and Rav Ashi are the end of the time when one can decide a halacha" רבינא ורב אשי סןף הוראה