He knew that he had better not drink;--that is, he had better not drink, supposing the world to be free to him for his own work and his own enjoyment. But if the world were no longer free to him, if he were really coming to penal servitude and annihilation,--then why should he not drink while the time lasted? 
He knew that he had better not drink; but why should he not drink while the time lasted? 