The Gemara in Berachos rules that one who exits a Beis Kenesses must not rush out with wide strides. To go to a Beis Kenesses however, is a different story – for then it is a mitzvah to run.

R' Tanchum says further that one should always run to do a mitzvah even on Shabbos, and cites a passuk as a proof.

When R' Zeira heard this halacha he felt relieved, because previously he had seen Rabbis running to the Shabbos shiur and had assumed that they were breaking Shabbos.

On Shabbos morning after the Tefilla may one stride home… in order to eat, after all eating three meals on Shabbos is a mitzvah ordained by the Neviim?

On Friday night we sing the zemer Kol Mekadesh. This zemer is of ancient origin having appeared in Machzor Vitry (written by disciples of Rashi) and comprises of lyrical stanzas referring to a number of the Day's halachos, "…Who walk on it with short strides and feast three times on it in order to bless You…"

In this part of the zemer, the paytan tells us that the purpose of eating is to bless G-d for giving us food, not to gorge ourselves. But the paytan juxtaposes this clause next to the halachah that prohibits running. Perhaps the message that he wishes to convey is that EVEN though eating is supposed to be an act of total holiness, running to a Shabbos meal is still prohibited, for who can honestly claim that all the tasty foods are eaten for the sake of Heaven and not for personal enjoyment? Idealism is good when injected with a dose of realism.