The source gives being devoid of benefit and courage among single intellectual points. In “Zayd is brave like a lion,” courage is the intended intellectual respect even though Zayd and the lion are both visible.
Likewise, knowledge can be likened to light in its capacity to guide or disclose something. Light is sensible, but the relation of guidance is understood intellectually.
Three questions should be kept distinct:
1. What are the two compared terms?
2. Which shared respect is intended?
3. Is that respect known through an external sense or through intellectual judgment?
The order prevents the two classifications from being conflated.