The first duty towards children is to make them happy. If you have not made them so, you have wronged them. No other good they may get can make up for that.
Bio: Isidore Isou, born Isidor Goldstein, was a Romanian-born French poet, film critic and visual artist. He was the founder of Lettrism, an art and literary movement which owed inspiration to Dada and Surrealism.