Why is Jesus’ Heart on fire?

Why is Jesus’ Heart on fire?

Jesus told St. Margaret Mary, “My Sacred Heart is so intense in its love for men, and for you in particular, that not being able to contain within it the flames of its ardent charity, they must be transmitted through all means.”

St. Gertrude the Great said, “O Sacred Heart of Jesus, fountain of eternal life, Your Heart is a glowing furnace of Love. You are my refuge and my sanctuary. O my adorable and loving Savior, consume my heart with the burning fire with which Yours is aflame. Pour down on my soul those graces which flow from Your love. Let my heart be united with Yours. Let my will be conformed to Yours in all things. May Your Will be the rule of all my desires and actions. Amen.”