The promises of man can fall because he needs help too but God cannot fail because His reservoir of resources cannot be exhausted. Put your total trust and confidence in God. Jesus helps and makes all of God's promises to be fulfilled to His church. He is the go between God and man, who ensures all the promises to us are released. Your obedience to God causes the manifestation of promises to your children. You don't need to struggle for anything but only seek Jesus to activate the promises of God for your life.