4126 - The Rebbe guides him on how to divide his time between Torah study and communal work.

You need both simple belief as well as understanding. You start with the basis of simple belief, and then you have the mitzvah to know Hashem; exert your mind to understand as much as you can, and when you encounter what is beyond your comprehension, rely on Emunah. https://www.torahrecordings.com/rebbe/igroskodesh/012/005/4126