"How great is the love the Father has lavished on us, that we should be called the children of God!" says John, but do we know who our Daddy is? It is easy to acknowledge that we are His children, but we don't always think about WHO it is that is our Father.
Strength from God is not always the strength we are praying for when we pray, "Lord make me stronger." Strength from God is no strength at all, yet then it makes total sense in God's economy.