20:9.1

When the progress of events on an evolutionary world indicates that the time is ripe to initiate a spiritual age, the Trinity Teacher Sons always volunteer for this service. You are not familiar with this order of sonship because Urantia has never experienced a spiritual age, a millennium of cosmic enlightenment. But the Teacher Sons even now visit your world for the purpose of formulating plans concerning their projected sojourn on your sphere. They will be due to appear on Urantia after its inhabitants have gained comparative deliverance from the shackles of animalism and from the fetters of materialism.