What is the meaning of heavenly spheres?

Everyone has all that he can use or comprehend, and as it is the design of the All-wise to create a hungering for knowledge of this fruitful and glorious home, spheres are prepared for the reception of all adapted to their condition.

Here they are nourished and educated to comprehend all its uses and all its blessings until prepared to enter the next abode.

Oftentimes, the guardian spirits from higher spheres descend and take them to other spheres to show the glories that await them when they will be prepared, which quickens their souls to embrace every opportunity to advance and enter the beautiful home beyond.