A wordplay with In, sight and insight

in
preposition (INSIDE) /ɪn/

Definition
A1 inside or towards the inside of a container, place, or area, or surrounded or closed off by something:

sight
noun [U] (ABILITY TO SEE) /saɪt/

Definition
B1 the ability to see:
If your sight is poor, you should not drive a car.
The old woman has lost her sight (= has become blind).

Insight:

insight
noun [C or U] /ˈɪn.saɪt/

Definition
C1 (the ability to have) a clear, deep, and sometimes sudden understanding of a complicated problem or situation:
It was an interesting book, full of fascinating insights into human relationships.