He had no settled plan of life, nor looked forward at all, but merely lived from day to day. Yet he read a great deal in a desultory manner, without … - James Boswell

Nay, Sir, it was not the WINE that made your head ache, but the SENSE that I put into it'
'What, Sir! will sense make the head ache?'
'Yes, Sir, (with a smile,) when it is not used to it.

[...] I observed he [Samuel Johnson] poured a large quantity of it [wine] into a glass, and swallowed it greedily. Everything about his character and manners was forcible and violent; there never was any moderation; many a day did he fast, many a year did he refrain from wine; but when he did eat, it was voraciously; when he did drink wine, it was copiously. He could practise abstinence, but not temperance.

"Yet he found an excuse for drunkenness which few men but he could have found. Stockdale (Memoirs, ii. 189) says that he heard Mrs. Williams 'wonder what pleasure men can take in making beasts of themselves. "I wonder, Madam," replied Johnson, "that you have not penetration enough to see the strong inducement to this excess; for he who makes a beast of himself gets rid of the pain of being a man."' [1278]"