...he asks if he should continue learning in Yeshivah, since he falls asleep sometimes at the time of learning etc.
It is obvious that this is also a plot and temptation of the evil inclination, that wants to distract a person from the service of the Creator in all ways, even in very strange ways, to the extent of persuading the person that he doesn’t have the ability to serve G-d properly, and like mentioned above, because he falls asleep.
He should ask the administration of the Yeshivah to give him a study-partner and he should learn with liveliness...and when he will truly want, there will be fulfilled in him the promise of our Sages – you worked hard and succeeded...
(See letter of the Lubavitcher Rebbe King Moshiach Shlita, Igros Kodesh vol. 14, pg. 343)