How about Feng's calligraphy of knowing and doing in one hanging in the office?

The unity of knowing and doing is the crystallization of Wang Shouren's psychology, that is, the object conforms to the subject, knowledge refers to conscience, and action refers to human practice. The unity of knowledge and action is neither to swallow action with knowledge nor to swallow action with action.

Feng is also a master of contemporary calligraphy. Hanging his words is of course very classy and can shine brilliantly.