Miracles are wonderful and shouldn't surprise us. They serve a purpose. But it you already have faith, you don't need to witness them anymore. Remember what Christ has said to Thomas: Blessed are those who have not seen, and have believed. Besides, Jesus as the enabler of all miracles has to be greater and more glorious than all of them. He has already come to us himself. So if you already believe in him, you only need to focus upon him and not the miracles.