The second reason a person refrains from learning at home is because he has become accustomed to sitting idle. This reason does not need refuting, for if a person made a mistake a hundred times, one need not explain to him that it is nevertheless a mistake. If a person rented an expensive vineyard for ten years and left it fallow for five years, surely he would be told to invest extra effort in the remaining five years to pay the rental for all the years and maybe even make a profit. He would not answer that since he left it fallow for five years he may as well leave it that way for the remaining five years. So it is with a person’s life, even though he wasted countless days sitting idle, as long as Hashem gives him strength he should gird his loins and utilize whatever time he has left to study diligently to fill the void.
ט״ו בכסלו ה׳תש״פ
"והאמת בלתי שום ספק כלל, שאם היה העולם כולו מקצה עד קצהו פנוי חס ושלום אף רגע אחד ממש מהעסק והתבוננות שלנו בתורה, כרגע היו נחרבים כל העולמות, עליונים ותחתונים, והיו לאפס ותוהו חס ושלום". (נפש החיים) 1