Parshat Vayishlach Ch 33 V 1-7
Yaakov was coming to Esav and he saw his wives and children and he set them up in a specific order. In the back he put Yosef and Rachel. We understand from this that Yaakov loved them so much, that GD forbid something would happen to them.
Rashi says that Yosef said my mother is a beautiful woman, maybe that Rasha is going to put his eyes on her and I am going to stand in front of her and prevent him from looking at her.
Yosef was a small child, how could he block a grown woman? Yosef did what he could and Hashem did the rest. The commentaries say that he actually grew.
Amazing concept, in Judaism reality is supernatural, because we are supernatural. Don't let the yetzer hara tell you that you can't. Don't say I can't, say I will try my best.