Mankind is fallen from his original state of righteousness in which he came from the hand of his Creator so that it is not possible now to see what he once was. Part of that fall involves the removal of the wisdom which he was originally given.
Some have felt called not to go for promotion (although God may guide us into it), but after a while they ask, ‘Can’t I do a better job?’ The heart may fret against standards he knows he ought to follow. Half the battle is recognizing the direction of temptation.