Only, the tendency which everything that exists has to prolong its own existence is sometimes interrupted by sudden impulses to which we give way with all the fewer scruples over letting ourselves go since we know for how many days, for how many months even we have been able, and might still be able to abstain. And often it is when the purse in which we hoard our savings is nearly full that we undo and empty it, it is without waiting for the result of our medical treatment and when we have succeeded in growing accustomed to it that we abandon it.
