Why has not man a microscopic eye?

For this plain reason,—man is not a fly.

Essay on Man. Epistle i. Line 193.

Die of a rose in aromatic pain.

Essay on Man. Epistle i. Line 200.

The spider's touch, how exquisitely fine!

Feels at each thread, and lives along the line.[316:2]

Essay on Man. Epistle i. Line 217.

Remembrance and reflection how allied!

What thin partitions sense from thought divide![316:3]