Palm Sunday, the gateway to Holy Week, is first of all the great memorial of our Lord's solemn entrance into Jerusalem when he was about to suffer and to die. He did not fall a victim to man's hatred; rather, he went voluntarily to his death, with royal freedom. His death had been divinely decreed as the purchase for man's redemption. This festive entrance was his wedding march, as he proceeded to seal with blood his Bridegroom's love for us all.
Pius Parsch, The Church's Year of Grace, Vol. II, 291.