Enthusiasm and love are needed for Torah and for every character trait. But it is something that is dependant on the heart and requires Heavenly assistance. For we know that such is our duty — to serve Hashem with enthusiasm and love and with great joy, but what are we to do? For our hearts are not aroused to it and our sins, as well, withhold the good from us; our eyes have been dimmed from seeing the great good of a mitzvah, how beautiful it is, and how fortunate we are that we have the opportunity to bring pleasure to our Creator, the King of kings, the Holy One, blessed is He. We also underestimate the abundant reward that is designated for even the slightest mitzvah. Consider the wicked Nevuchadnezzar who received great honor and ruled over the entire world in the merit of walking four steps for the honor of Hashem. How much more so is the reward destined for the righteous in the Future to Come.
Let each person reckon for himself: If I have such desire and enthusiasm for food and drink that are pleasant to my tongue for only a fleeting moment and enthusiasm for monetary gain and other such pleasures of this World — illusionary pleasures that have no substance — then how much more so should I have love and enthusiasm for matters of eternal life; to bring pleasure to our Creator Who chose us to stand before Him and serve Him. There is no higher greatness than that. These and similar thoughts should a living person have during moments of free time — to arouse love and desire for Hashem.