Some faults are so closely allied to qualities that it is difficult to weed out the vice without eradicating the virtue.
Source: In The Ultimate Success Quotations Library, 1997.
-- Oliver Goldsmith, (Nov 10 1728-1774), Irish-British poet, dramatist, author; He is noted for She Stoops to Conquer, 1773 and The Vicar of Wakefield, 1766.