Or come a cold blast in the night,
There's no breath in it.
The bird but seeks his proper food —
And Providence, whose power endu'd
That fly with life, when it thinks good,
May justly take it.
But you have no excuses for't —
A life by Nature made so short,
Less reason is that you for sport
Should shorter make it.
A fly a little thing you rate —
But, Robert do not estimate
A creature's pain by small or great;
The greatest being
Can have but fibres, nerves, and flesh,
And these the smallest ones possess,
Although their frame and structure less
Everyone experiences pain. Pain exists in every being and whether the being is small or great they still experience it. Is a fly’s pain as important as Lamb describes it to be? 

Thoughtless Cruelty