Kabbalah zu Ijow 5:1

(Bringing proof from Job 5:1 “Now call/cry out” that [the word] "call" is synonymous with prayer). However, the Holy Presence says “What shall I call?" Meaning, I do not have the strength to rise from the ground, for “all flesh is grass”, they are all compared to animals that eat grass. Meaning, that they perform the Mitzvot without thought, similar to [the thoughtless actions of] an animal. “And all their kindness is like the blossom of the field” (that is cut off and dries). For all their kindness, they do for themselves, meaning, their intent in performing Mitzvot is only to benefit themselves and not for their Creator.