I never knew the power of a single yellow heart until I met my friend Jenny. Jenny knows the inside of the same pediatric cardiac care units that I do. She knows clinging to Jesus as your child is waiting on a heart transplant list. And she imagines and longs for the little voice crying out “Mama!” when she gets to Heaven, the same way I now do. As I walked out Savannah’s journey, Jenny should have had every reason to stay as far away from my family as she possibly could. I could have been called a trigger to her own. She decided, instead, that we are tougher together.…