Why having lots of children and parenting them really well is the best way to put energy into the system:
There is no other institution which suffers from time so much as religion. At the moment when it is remotely possible that a whole generation might have learned something both of theory and practice, the learners and their learning are removed by death, and the Church is conronted with the necessity of beginning all over again. The whole labour of regenerating mankind has to begin again every thirty years or so.
-Charles Williams, The Descent of the Dove, p.83
Good thing the Holy Spirit does things too.