ייִדישער מחשבֿה אויף משלי 31:6

Afterwards, practice fasting if your body is strong enough, even if this is only one day per week. Whatever you can do to train yourself to be indifferent to matters of eating and drinking, do so. Regard what you eat as a medicine (to heal your hunger) rather than as food. Your drinking should be only water, unless your intent in drinking wine is to benefit your body, or to remove distress from your heart, as written: "Give strong drink to he who is ready to perish and wine to the bitter soul" (Mishlei 31:6).
Afterwards, practice fasting if your body is strong enough, even if this is only one day per week. Whatever you can do to train yourself to be indifferent to matters of eating and drinking, do so. Regard what you eat as a medicine (to heal your hunger) rather than as food. Your drinking should be only water, unless your intent in drinking wine is to benefit your body, or to remove distress from your heart, as written: "Give strong drink to he who is ready to perish and wine to the bitter soul" (Mishlei 31:6).