So each generation should set its hope anew on God, not forgetting his glorious miracles and obeying his commands. (Psalm 78:7 NLT)
Every Christian has the responsibility of passing along "the faith" to the next generation. This is more than just teaching them the doctrines of Christianity, but includes helping them take ownership of "the faith" for themselves. Followers of Jesus coming behind us have to set their "hope anew on God" and develop their own walk with Him. At some point each generation has to move beyond a theoretical knowledge of God to the place where they are personally experiencing Him for themselves.