"Even before they were born, they, with many others, received their first lessons in the world of spirits and were prepared to come forth in the due time of the Lord to labor in his vineyard for the salvation of the souls of men."
Doctrine and Covenants 138:56
This section talks about Christ's visit to the spirit world in between his death and resurrection, and how he brought the gospel to the dead. It's a fascinating section, if you want to read more. What struck me today as I was reading it is the references to our premortal existence. I always wonder what it was like, and also, how different things will be when we can remember that time. I love this verse talking about how we received lessons in the world of spirits. Maybe we weren't all in the advanced class with Abraham, Adam and Eve, Isaiah, etc... but I doubt any of us sat out of class entirely. :) The idea of lessons before we were born fits in with the idea of this life as a learning experience... on this Earth we're working on learning and growing and becoming smarter, wiser, and more beautiful of soul, just like we were then. :) Today, let's get out there and learn. :)