Abraham Lincoln? Alphonse Karr? B. Fay Mills? Roe Fulkerson? J. Kenfield Morley? Anonymous? Dear Quote Investigator: A popular quotation about achieving the proper perspective on life is often attributed to Abraham Lincoln: We can complain because rose bushes have thorns, or rejoice because thorn bushes have roses. Optimistic and pessimistic viewpoints are ingeniously contrasted in …