Full Idea
All our knowledge comes through our senses, but that doesn't mean that everything we know is sensed.
Gist of Idea
Knowledge may be based on senses, but we needn't sense all our knowledge
Source
Thomas Aquinas (Quaestiones Disputatae de Malo [1271], Q6.h to 18)
Book Reference
Aquinas,Thomas: 'Selected Philosophical Writings', ed/tr. McDermott,Timothy [OUP 1993], p.182