Shabbos Reforms Our Habits
When we call Shabbos a delight and sing Hashem's praise, joy refines the foreign thoughts and bad habits of the week.
Yeshaya (58:13) speaks of turning back one's feet on Shabbos and calling Shabbos a delight. The Rymanover taught that real joy awakens on Shabbos when we praise Hashem in song and take delight in the glory of His name. That joy lifts and refines the distracting thoughts a person gathered during the week, and the habits he formed. The word for "your feet" can also mean "your habit." The navi is saying that when you call Shabbos a delight and truly rejoice, your habits are changed and elevated because of Shabbos itself. Simchah on Shabbos, in this view, is not decoration but a tool for transformation.
Source: Menachem Tzion, Yeshaya 58:13 (Haftarah of Yom Kippur)
This Shabbos, choose one small habit you want to leave behind, such as checking your phone at the table, speaking sharply or rushing through zemiros. Then add one thing that brings you real delight: a favorite song, a good meal shared slowly, a walk with a family member. Let the delight do the work. Instead of fighting the habit, fill the space with joy and see whether it loosens. Next week, try a second small change.