Some noteworthy maxims from the Doctor’s 1759 pilgrimage novel The History of Rasselas, The Prince of Abissinia:
Truth, such as is necessary to the regulation of life, is always found where it is honestly sought.
The truth is, that no mind is much employed upon the present: recollection and anticipation fill up almost all our moments.
No disease of the imagination, answered Imlac [Imlac's is the voice of Samuel Johnson], is so difficult of cure, as that which is complicated with the dread of guilt. … If fancy presents images not moral or religious, the mind drives them away when they give it pain, but when melancholick [i.e., depressed] notions take the form of duty, they lay hold on the faculties without opposition.