Shir Ha-Ma'alot #27

"Young lions may want and hunger"
What do lions lacking food have to do with us? Our Rabbi, Ha-Rav Tzvi Yehudah, explains, that the word for "young lions" [kefirim] is derived from the word "heresy" [kefirah]. A "kofer" [heretic] is one who stumbles on heresy when it chances upon him. A "kefir" [young lion] is someone who has the trait of heresy implanted into the essence of his personality. The materialistic heretics [kefirim] are hungry, "but those who seek Hashem will not lack any good."