Alexander Pope, Essay on Man  1732 (excerpts)

Presumptuous man! the reason wouldst thou find,
Why form'd so weak, so little, and so blind?
First, if thou canst, the harder reason guess
Why form'd no weaker, blinder, and no less!
Ask of thy mother earth why oaks are made
Taller or stronger than the weeds they shade…

The bliss of man (could pride that blessing find)
Is not to act or think beyond mankind;
No powers of body or of soul to share,
But what his nature and his state can bear.
Why has not man a microscopic eye?
For this plain reason, man is not a fly….

All Nature is but Art unknown to thee;
All chance direction, which thou canst not see;
All discord, harmony not understood;
All partial evil, universal good:
And spite of Pride, in erring Reason's spite,
One truth is clear, Whatever is, is right.

Know then thyself, presume not God to scan,
The proper study of mankind is Man.
Placed on this isthmus of a middle state,
A being darkly wise and rudely great:
With too much knowledge for the Sceptic side,
With too much weakness for the Stoic's pride,

He hangs between, in doubt to act or rest;
In doubt to deem himself a God or Beast;
In doubt his mind or body to prefer;
Born but to die, and reas'ning but to err;
Alike in ignorance, his reason such,
Whether he thinks too little or too much;

Chaos of thought and passion, all confused;
Still by himself abused or disabused;
Created half to rise, and half to fall:
Great lord of all things, yet a prey to all;
Sole judge of truth, in endless error hurl'd;
The glory, jest, and riddle of the world!