“Aren’t two sparrows sold for a penny? Yet not one of them falls to the ground apart from your Father’s will.”
Jesus guarantees that his messengers are not forgotten by the Father when they encounter resistance to the Good News. They need not question whether God has forgotten them.
The argument is from the lesser to the greater. God knows what happens to his creatures. So he will care for his most important creation: his children. Do you believe this as you share the Gospel?