reveal : conceal
awareness indifference
The word pair "AWARENESS APATHY" would best complete the analogy. Perception is to awareness as insensitivity is to apathy, highlighting the contrast in attentiveness and emotional response.
Awareness and ignorance.
The analogy would be perception : sensitivity :: insensitivity : callousness. Just as sensitivity is a heightened awareness or responsiveness, callousness is a lack or disregard for the feelings or well-being of others.
hot : cold
ravenous : voracious
impressive : grand
slay : spare
independence : slavery
hot : cold
courage : bravery
stimulate : excite