I am all in favour of your idea that we should go back to our old plan of having a more or less set subject—an agendum—for our letters. When we were last separated the correspondence languished for lack of it. How much better we did in our undergraduate days with our interminable letters on the Republic, and classical metres, and what was then the “new” psychology! Nothing makes an absent friend so present as a disagreement.
C.S. Lewis, “From Letters to Malcolm: Chiefly on Prayer,” The Essential C.S. Lewis (Touchstone, 1996) 407.