In this episode, Tanner and Luke discuss faith, identity and their strong family relationships with non-blood relatives. Tanner opens up about why he does not follow religion but believes in something bigger.  They debate about God being a person or presence of just energy while trying to understand what drives people to do good in life. They demonstrate that two people can believe differently yet still care deeply about each other. 
This episode talks about chosen family, maturity, relationships,  and the bonds that keep it all together.  Different beliefs. Same loyalty and love for the people who truly matter.