That would live godly (ο θελοντες ζηιν ευσεβως). "Those who desire (will, determine) to live godly." Paul does not regard his experience as peculiar, but only part of the price of loyal service to Christ.

Shall suffer persecution (διωχθησοντα). Future passive of διωκω, "shall be persecuted" (shall be hunted as wild beasts).