When the Previous Lubavitcher Rebbe, Rabbi Yosef Yitzchak Schneersohn was a child, he once asked his father the following:
“Why is it that G-d created man with two eyes? Wouldn’t man have sufficed with one eye, just as he has one nose and one mouth?”
His father, the fifth Lubavitcher Rebbe, Rabbi Sholom DovBer responded:
“There are certain things that one should look at them with their right eye—with love and affection. Yet, other things should be viewed with the left eye—with indifference and in a removed manner. A person should view a siddur (prayer book) or a Jew with their right eye but should look at candies and toys with their left eye.”
(Sefer HaToldos, Previous Lubavitcher Rebbe. Vol. 1. Pg. 8)