I have mentioned the path of learning of Rav Nahman on occasion to people and the reaction as you can imagine is always the same,-- ''that learning without understanding is worthless.'' And yet I have noticed that these same people, then drop the subject completely because it is too hard, and end up knowing nothing.

Just to be clear the idea is to say the words and go on without worrying if one understands or not.

See the Conversations of Rav Nachman 76. I mean how terrible would it have been if they had picked up a gemara and gone through one whole tractate with Rashi, Tosphot and the Maharsha--whether they understood every single word or not? If they had, they certainly would now know a lot more than what they actually did do--that is learn nothing. And after doing one tractate in that way, they certainly would have had the desire to continue and do another tractate,..and then another,..  and another until they would have finished the whole shas [Talmud] with Rashi and Tosphot and then again and again many times. And then they would learn the Jerusalem Talmud in the same way.

And the same goes for math and physics. I also said to people that this method also applies to these subjects and the reaction was again the same. ''If you do not understand then it is worthless.'' and so they drop these and also end up knowing nothing. But I guarantee to you that if they had picked up a few books on calculus and algebraic topology and quantum field theory, they would surely know a lot more today that what they do know which is zero.