http://revach.net/article.php?id=4597

Section: Parshas HaShavua   Category: Quick Vort
Parshas Chukas: Rav Shimon Schwab - The Spirit Needs To Break Free
"Zos HaTorah Adam Ki Yamus BaOhel" (Chukas 19:14).  When a dead body lies in a room the whole room becomes Tamei.  The gemara (Brachos 43b) homiletically darshans from here, that this is how Torah is acquired, by martyring yourself toiling over it in a tent.

Rav Shimon Schwab asks what is the parallel to the lesson of Tumas Ohel and success in Torah?  He answers that the reason why a dead body makes the whole room tamei is because after death the body is not strong enough to contain the soul within it.  The soul breaks free and spreads to the entire room.

Similarly we find by Torah, says Rav Schwab that if a person is alive, meaning sustaining himself and his reputation through Torah, the Torah will remain entirely within him and will go shine on the outside world.  In turn since this is not the natural state of Torah, he himself will not be able to keep it either.

However if a person kills himself over Torah, he negates his own self interest and his Torah is learned for Hashem and for Klal Yisroel, then his Torah will reach its mark and impact the world, as well as remain within him.