Orchot Tzadikim
Then there is a man who changes his habits and is not stable. At one time he clings to this quality and at another time he departs from that habit and takes hold of another habit and thus he keeps doing always, and he is like a man who wants to get to a city but does not know the way to it, nor does he know any of the paths that will lead him to the highway. Therefore, he is bewildered. One time he goes by one path and he strays, so he comes back and tries another path, and thus he does with a third path and with a fourth. Concerning such men, the wise man said: "The labour of fools wearieth every one of them, for he knoweth not how to go to the city" (Eccl. 10:15).