I always learn a tremendous amount from the story of Joseph in the book of Genesis. There are many lessons that he can teach us. Here is one that I wanted to share. It comes from Genesis 37.
"Israel loved Joseph more than any of his other sons because he was the child of his old age. And he made him an elaborately embroidered coat. When his brothers realized that their father loved him more than them, they grew to hate him—they wouldn't even speak to him." -Gen. 37:3-4
Are you a parent? Are you an honest parent? Then honestly examine whether you have a "favorite". Because, your true inner feelings are telegraphed and evident...your kids will know!
Here's the most important reality as I see it:
Parental Favoritism hurts the "the favorite", the ones who aren't, and even the parents in the long run. Everyone loses.
If this applies to you or anyone you know...then, think about it and pray about it.