What are the great halls of learning?

These beautiful halls have been erected by a large concourse of spiritual beings, as a suitable and convenient place wherein to teach spirit lives―

They are halls of marble, which is strong, beautiful and enduring―its whiteness, purity―the gold veining, true worth―the elegant windows of stained glass in all colours symbolise that all do not perceive alike―the chairs of gold signify that all are of worth―the red cushions that Eternal Love holds all souls in an eternal embrace―the three steps leading to the rostrum symbolise body, spirit, soul―the rostrum itself, the higher plane from which spirit lives―or souls look down and give forth teachings to those not yet arrived at their altitude.