Cf: Unseen, unrued (Am.). What the eye does not see, the heart cannot grieve (does not grieve over) (Br.). What the eye doesn't see, the heart doesn't feel (grieve for) (Am.). What the eye sees not the heart rues not (Am., Br.)
Русско-английский словарь пословиц и поговорок. Академик.ру. 2013.