How much more abominable and filthy is man,
which drinketh iniquity like water?
Job 15:16
"How much more abominable and filthy is man -
How much less
would he put confidence in man, who is filthy and 
abominable in his
natures and profligate in his practice, as he drinks down iniquity like
water?
A man who is under the power of sinful propensities commits sin
as greedily as the thirsty man or camel drinks down water.
--He thinks he
can never have enough.
This is a finished character of a Bad man; he
hungers and thirsts after Sin: on the contrary, the Good man hungers and
thirsts after Righteousness."
Adam Clarke