Full Idea
If spirit is immortal and can remain sentient when divorced from our body, we must credit it with possession of five senses; but eyes or nostrils or hand or tongue or ears cannot be attached to a disembodied spirit.
Gist of Idea
For a separated spirit to remain sentient it would need sense organs attached to it
Source
Lucretius (On the Nature of the Universe [c.60 BCE], III.624)
Book Reference
Lucretius: 'On the Nature of the Universe', ed/tr. Latham,Ronald [Penguin 1951], p.115
A Reaction
This is a powerful argument against immortality. If you are going to see, you must interact with photons; to hear you must respond to compression waves; to smell you must react to certain molecules. Immortality without those would be a bit dull.