Sit & Solve Cryptograms

Substitute one letter for another and you'll be able to read fantastic quotations from famous people. Hints help narrow down the choices. Remember that a one-letter word is always A or I, and that in a two-letter word, one must be a vowel. Apostrophes can also eliminate lots of possibilities. Some words--like AND--occur over and over, so look out for them. Keep an eye out for -ed, -ing, and -tion endings, too. In every cryptogram the code is consistent, but it does change from puzzle to puzzle.