아모스 4:12의 Musar

They further said (Shabbat 10a): "Rava would don a cloak and pray, saying: 'prepare to meet your G-d, O Israel' (Amos 4:12)".

But, here too one needs to discern and make distinctions, for all this was said regarding the mitzvot themselves which we are completely obligated in. In those one should "set his face like flint" (Isaiah 50:7).

These things can only be evaluated by one of understanding heart and sound intellect since it is impossible to clarify all their endless details, and "G-d gives wisdom; from His mouth comes knowledge and understanding" (Mishlei 2:6).