Musar su Levitico 26:8

4) The verse (Mishlei 2:4): "If you seek it [Torah] as silver… then you will understand the fear of G-d" is well known. And in monetary matters it is well known that if a business opportunity presents itself to a man, by which he can earn five gold pieces, and another opportunity, by which he can earn double, he will certainly choose the second. In our case, too, is it not known that there is no comparison between a few who occupy themselves with a mitzvah and many who do so? As it is written (Vayikra 26:8): "And five of you will pursue a hundred, and a hundred of you, ten thousand" (see Rashi there). Therefore (as it concerns our subject) it is known that [in the synagogue] aside from the mitzvah of prayer, we fulfill other commandments of the Torah: a) the positive mitzvah of tefillin, b) the positive mitzvah of reciting the Shema, c) the positive mitzvah of remembering Egypt. If so, if one comes to the synagogue to pray with a minyan, and all fulfill all of these mitzvoth, each mitzvah rises [proportionately] in holiness, which is not the case with one who prays alone.