I never memorized "If", but was a big Kipling fan when I was young...I always wanted to memorize some part of "Jabberwocky", but always got confused by Mad Magazine's satire of the same; "'Twas Brillo, & the GE stoves, did Proctor-Gamble in the Glade..."

But I did memorize the first part of this one:

The time has come, the Walrus said,
To talk of many things...
Of shoes & ships & sealing wax,
Of cabbages & kings,
And why the sea is boiling hot,
And whether pigs have wings...

And I wasn't surprised too much to learn later that John Lennon was inspired by the poem to write the Beatles' "I Am The Walrus".

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If the theory does not conform to the facts, then the facts must be discarded.

No good deed ever goes unpunished

Never argue with an idiot. He'll drag you down to his level, & beat you with experience.