Tell all the truth but tell it slant
Success in circuit lies
Too bright for our infirm delight
The truth's superb surprise
As lightning to the children eased
With explanation kind
The truth must dazzle gradually
Or every man be blind.
- Emily Dickinson
I did it from memory, and then looked it up and messed up one line. I don't know why I remember this poem, but it wormed into my brain in college and is one of only three poems I can cite from memory. The others are "Apparently with no surprise" by Dickinson, and my favorite poem to ridicule by William Carlos Williams that has the chickens by the wheelbarrow.
My ancestors fought cave bears so I could make this post.