Someone once met a lad going to school long before the days when transport was provided. The lad was carrying on his back a smaller boy who was clearly lame and unable to walk.
The stranger said to the lad, “Do you carry him to school every day?”
“Yes,” said the boy.
“That’s a heavy burden for you to carry,” said the stranger.
“He’s not heavy,” said the boy. “He’s my brother.”
No burden is ever too heavy when it is received and carried in love.