In Parshat Terumah, God helps us bond with one another by having us work on a national building project. Every aspect of this building project, the creation of the Mishkan, was thought through. 

We can learn from this parsha to act in a unified, helping manner. We can also make sure to remember that our body is as sacred and holy as a Mishkan, and therefore we should serve God with it, just like the Kohanim served God within the Mishkan.