Rabbi Yisroel Salanter would constantly say that the root of all transgressions is a lack of Emuna.
It comes from a failure to internalize the fact that there is a reward for doing good and punishment for doing wrong.
It comes from a failure to visualize how an evil person suffers in Gehenom while the righteous are blessed with eternal ecstasy.
~ R’ Chaim Mordechai Katz zt”l (1894-1964)
