Just so you know....finding quotes lauding grammar isn't quite as easy as finding quotes (from famous writers) that give a healthy ration of crap to pedants.
Every English poet should master the rules of grammar before he attempts to bend or break them.
A man's grammar, like Caesar's wife, should not only be pure, but above suspicion of impurity.
And lastly because this was just too awesome, here is Douglas Adams explaining the trouble with time travel grammar.
The event will be descibed differently according to whether you are talking about it from the standpoint of your own natural time, from a time in the further future, or a time in the further past and is futher complicated by the possibility of conducting conversations while you are actually traveling from one time to another with the intention of becoming your own mother or father.
Most readers get as far as the Future Semiconditionally Modified Subinverted Plagal Past Subjunctive Intentional before giving up; and in fact in later aditions of the book all pages beyond this point have been left blank to save on printing costs.