As we pass Houses musing slow — Open Mind

As we pass Houses musing slow ¹
If they be occupied
So minds pass minds
If they be occupied

(F.1723/J.1653)

[1] we:: students. pass:: to experience, go to. Houses:: colleges in a university (OED house 4b). slow:: dull, heavy in wit; musing implies meaning of not swift already.
[2] they be occupied:: the colleges be busied (with events and classes).
[3] minds pass minds:: our minds ignore teachers' minds.
[4] they be occupied:: teachers' minds be full and closed.