The Third Joyful Mystery of the Rosary is the birth of Jesus Christ.
Thank you for deciding to be born on earth as a tiny weak little baby who couldn't talk, even though you're God! I mean, you could have decided to skip being a baby. You could have decided to just appear as a majestic and powerful king who could do anything. Instead, you decided to limit yourself and lower yourself into the form of weakness, so I know you love me when I am weak and when I cannot do very much. And I'm autistic, and I can see how you love me, because you decided to be born as a person who couldn't speak yet.
I love you,