We see that people aren’t lazy when a good financial opportunity comes up, and if the returns are high enough, they aren’t even fazed by whatever effort needed. On the contrary, they go about their work happily and energetically as they think about the expected rewards. Even if the work is fraught with risks, they will not flinch, because they expect to make their life easier by increasing their income. If a person does this even for the short span of time he has in this world, how much more so should he invest in his true eternal life, and should even limit his investment of time and effort in improving his state in this world to earn good wages in the world to come.
כ״ב באלול ה׳תשפ״א
"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