My son started repeating specific lines from the books we had read about why it was so good to be a big brother. The repetition of reading the books had taught him how to navigate this situation. I realized then the power of a book to teach.
Parenting Highly Sensitive Children
Highly sensitive children are deep thinkers, empathetic, and creative. They are also very emotional, easily overstimulated, and can require much more patience to parent. If we can help them manage the challenging sides of their gift, they will grow up to use their intelligence, creativity, and empathy in positive ways.