An amazing story from Rabbi Zev Leff which makes us rethink what is important in life after reading the Ohr HaChaim on 

אֶ֨ת־כַּסְפְּךָ֔ לֹֽא־תִתֵּ֥ן ל֖וֹ בְּנֶ֑שֶׁךְ וּבְמַרְבִּ֖ית לֹא־תִתֵּ֥ן אׇכְלֶֽךָ׃ 

Do not lend your money at advance interest, nor give your food at accrued interest. 

The Ohr HaChaim HaKadosh: 'You shall not give him your money upon interest;' Here the Torah explains what the words נשך ומרבית are all about; they darken the divine light G'd provides. The word את כספך refers to the material things man yearns for in this world believing them to be of real value though their value is totally illusory. לא תתן לו בנשך When man fulfils his animalistic instincts and thereby tries to gratify his spiritual needs his spirit is actually 'bitten,' נשוך and the poison of sin is absorbed by that person's רוח. The Torah continues: ובמרבית לא תתן אכלך, 'and you must not give him your food in return for increase.' The Torah means that even your food, i.e. something that it is certainly permissible for you to eat you must not consume to excess, i.e. מרבית. When a person follows the needs of his palate he gradually increases his appetite for more food than is needed to sustain him. This is turn also leads to the divine light G'd has granted us by means of our pure soul being gradually more and more 'blacked out.' The stronger the physical in man the weaker his spiritual capacity. Encouraging the body to grow stronger through gratifying its appetites therefore is sinful.