Quoted from Martin Scorsese's letterboxd list profile:
"I love the idea of putting different films together into one program. I grew up seeing double features, programs in repertory houses, evenings of avant-garde films in storefront theatres. You always learn something, see something in a new light, because every movie is in conversation with every other movie. The greater the difference between the pictures, the better.
Over the years, I've been asked to pair my own pictures with older films by other people that have inspired them. The request has come from film festivals, which present the pairings as a program. The terms "inspiration" and "influence" aren't completely accurate. I think of them as companion films. Sometimes the relationship is based on inspiration. Sometimes it's the relationships between the characters. Sometimes it's the spirit of the picture. Sometimes it's far more mysterious than that.
Here is a list of my own films and their companions in cinema history."