Fortunate are those who can learn Torah for many hours a day, but many people can't. The obligations of parnassah take up much of their time. Nevertheless, they should have their times and moments when they study Torah. Those times are very precious.
Tzaddikim of Slonim zt’l would say that when you have an hour of Torah study, consider it a "#1". An hour without Torah is a zero. Place the many zeros after the one, and you have a large number.
The question is, how does one place the zeros after the one? Perhaps the zeros will come before the one?
The tzaddikim of Slonim replied that if you consider the hour of Torah the most important part of your day, you have placed the "1" before all the zeros. But if the work hours are more important to you, then you have placed the zeros before the one.
The father of the Shlah Hakodesh, Reb Sheftel Ish Levi zt'l, teaches that just as we daven each day and wear tefillin each day, studying Gemara, Rashi, and Tosfos each day is no less of an obligation. A day shouldn’t pass when one isn’t involved in Torah.
Sometimes people feel they need every minute of their day to earn money and don’t have time for Torah study. We remind them of the Gemara (Avodah Zarah 19), which says, ‘Whoever studies Torah, Hakadosh Baruch Hu fulfills his desires….Whoever studies Torah, his assets prosper.’ Torah study is mesugal for wealth and success. Setting time for Torah won't lessen the parnassah.
A chassid once wrote a kvittel to Rebbe Yochanan of Rachmastrivka zy’a stating that he wants a brachah for hatzlachah in everything he does.’
Rebbe Yochanan Rachmastrivka told him, ‘Dovid HaMelech was also a great Rebbe. His counsel for hatzlachah was to study Torah. As it states (Tehillim 1), כי אם בתורת ה' חפצו... וכל אשר יעשה יצליח, ‘His desire is solely Hashem's Torah…whatever he does prospers.’ This isn’t solely a brachah; it's a guarantee. If you study Torah, you will succeed in everything you do.’