[Johnson] bid me always remember this, that after a system is well settled upon positive evidence, a few objections ought not to shake it. “The human mind is so limited that it cannot take in all parts of a subject; so that there may be objections raised against anything. There are objections against a plenum, and objections against a vacuum. Yet one of them must certainly be true.”
James Boswell, London Journal, 22 July 1763
Dr. Adams found him one day busy at his Dictionary, when the following dialogue ensued. “ADAMS. This is a great work, Sir. How are you to get all the etymologies? JOHNSON. Why, Sir, here is a shelf with Junius, and Skinner, and others; and there is a Welch gentleman who has published collection of Welch proverbs, who will help me with the Welch. ADAMS. But, Sir, how can you do this in three years? JOHNSON. Sir, I have no doubt that I can do it in three years. ADAMS. But the French Academy, which consists of forty members, took forty years to compile their Dictionary. JOHNSON. Sir, thus it is. This is the proportion. Let me see; forty times forty is sixteen hundred. As three to sixteen hundred, so is the proportion of an Englishman to a Frenchman.”
James Boswell, The Life of Samuel Johnson, London, 1791, vol. 1, p. 101
Sir Joshua Reynolds once asked him by what means he had attained his extraordinary accuracy and flow of language. He told him, that he had early laid it down as a fixed rule to do his best on every occasion, and in every company: to impart whatever he knew in the most forcible language he could put it in; and that by constant practice, and never suffering any careless expressions to escape him, or attempting to deliver his thoughts without arranging them in the clearest manner, it became habitual to him.
James Boswell, The Life of Samuel Johnson, London, 1791, vol. 1, p. 109
[A]ny company, any employment whatever, he preferred to being alone. The great business of his life (he said) was to escape from himself.
James Boswell, The Life of Samuel Johnson, London, 1791, vol. 1, pp. 167-168