The general way the idea of Bitul Torah is looked at is that if there is a positive commandment that can not be done by anyone else, then one is required to stop learning Tora and do that commandment.
The way the Gra understands it is that not that one is required, but one is allowed to stop learning. And that makes more sense because the rule is one positive command does not push off another one."
This all come from a Gemara Yerushalmi that one sage sent his son to another city to learn Torah. Word got back to him that his son was doing other kinds of commandments. He sent to him, "I did not send you there for those other reasons but to learn Torah."
The issue of ספרים חיצוניים [outside books] comes up in Sanhedrin and it is related to the idea of Bitul Torah in this way. What constitutes Torah? According to the Rif and Rosh ספרים חיצונים are books that explain the Torah in ways other than the ways the sages of the Mishna and Gemara explained it.
Thus to understand Torah besides the two Talmuds one would learn the Midrashim that were written by the sages of the Talmud. I had in fact had learning partner Hagai Preshal who learned the Midrash Raba in his spare time. [The basic ones as far as I recall are מדרש רבה, מדרש תנחומא, אליהו רבה וזוטא ספרי ספרא תורת כהנים]
[I should add that things that the Rambam considered important to learn, I do not think are Bitul Torah. That is Physics and Metaphysics. To the Rambam that refers to these two subjects as understood as such by the Ancient Greeks. In my mind that would mean basically Quantum Field Theory and Aristotle's book The Metaphysics.
The way to go about this is to get to it right when you wake up in the morning, have the first cup of coffee and then Gemara and --Quantum Field Theory. Just open it up and say the page after page in order.
The way the Gra understands it is that not that one is required, but one is allowed to stop learning. And that makes more sense because the rule is one positive command does not push off another one."
This all come from a Gemara Yerushalmi that one sage sent his son to another city to learn Torah. Word got back to him that his son was doing other kinds of commandments. He sent to him, "I did not send you there for those other reasons but to learn Torah."
The issue of ספרים חיצוניים [outside books] comes up in Sanhedrin and it is related to the idea of Bitul Torah in this way. What constitutes Torah? According to the Rif and Rosh ספרים חיצונים are books that explain the Torah in ways other than the ways the sages of the Mishna and Gemara explained it.
Thus to understand Torah besides the two Talmuds one would learn the Midrashim that were written by the sages of the Talmud. I had in fact had learning partner Hagai Preshal who learned the Midrash Raba in his spare time. [The basic ones as far as I recall are מדרש רבה, מדרש תנחומא, אליהו רבה וזוטא ספרי ספרא תורת כהנים]
[I should add that things that the Rambam considered important to learn, I do not think are Bitul Torah. That is Physics and Metaphysics. To the Rambam that refers to these two subjects as understood as such by the Ancient Greeks. In my mind that would mean basically Quantum Field Theory and Aristotle's book The Metaphysics.
The way to go about this is to get to it right when you wake up in the morning, have the first cup of coffee and then Gemara and --Quantum Field Theory. Just open it up and say the page after page in order.
