Teach
Optimus was surprised when Sam asked to learn about Cybertron and its people through his memories and experiences, he had the histories in his head thanks to the Allspark, but he wanted to see the planet as Optimus had seen it. The leader had been pleased to comply with the request.
With the other Autobots often joining in, Optimus told Sam about his life on Cybertron, about the culture and society he had once known well.
Sam was a diligent student, remembering everything he was told, even managing to master the skill of translating their language, although he could only speak parts of it.
As time passed, Mikeala, Will, Annabelle, Robert, Sarah, and a few others began to listen in, and Sam made a point of ensuring his children did too when they were old enough.
Family is supposed to know about each other, was the reason given when they were questioned about it by others, and that warmed Optimus' spark.
The lessons taught him something too, while Cybertron and many of his comrades were gone, he had a home and friends here that really were just as wonderful.
He would cherish them, life had taught him to do that.