'Ay sir, to be honest as this world goes, is to be one man pick'd out of two thousand.' is an example of-

Hyperbole is an exaggerated statement or an extreme overstatement.
Example of hyperbole:
- 'Ten thousand saw I at a glance' (The Daffodils, William Wordsworth).
- "Ay sir, to be honest as this world goes, is to be one man pick'd out of two thousand." is an example of- Hyperbole.

[Source: An ABC of English Literature, Dr. M Mofizar Rahman]