R. Meir Simchah of Dvinsk, the renowned author of the Or Sameach and one of the most profound halakhic scholars of all time, makes a profound comment in his Meshekh Chokmah which is most appropriate to the day we now celebrate, Shabbat Ha-gadol, the special Sabbath which heralds the celebration of our festival of freedom, Passover. There are two types of mitzvot: those that bind a Jew to his G-d, and those that bind him closer to his fellow-Jew. Thus, observances like tzillit, tefillin, and mezuzah bring the Jew directly into communion with G-d, whereas mitzvot such as charity, love of fellow-man, and terumah bring him into closer community with other Jews.