18 Servants, be subject to your masters with all fear, not only to those who are good and considerate, but also to those who are crooked. 

19 For this finds favor, if for the sake of conscience toward God a person bears up under sorrows when suffering unrighteously. 

20 For what credit is there if, when you sin and are harshly treated, you endure? But if when you do good and suffer for it, you endure, this finds favor with God. 

21 For to this you have been called, since Christ also suffered for you,

Referenced Scripture:

John 15:18—20

James 1:2-4

1 Peter 1:6-7

Quotes:

“New Testament writers were not social revolutionaries.  They did not believe that overhauling social structures would transform culture.  Their concern was the relationship of individuals to God, and they focused on the sin and rebellion of individuals against their Creator.  New Testament writers therefore concentrated instead on the godly response of believers to mistreatment.”  (Thomas R. Schreiner)

 

“The Lord wants believers, when suffering unjustly in the work place, not to falter in their witness but humbly and patiently to accept unjust treatment, knowing that God has sovereign control of every circumstance and promises to bless.”  (Dr. John MacArthur)

 

“So what Peter said here was that believers were called to experience their final reward through enduring suffering.  Suffering, in other words, is not a detour by which believers receive the inheritance to which they were called.  It is God’s appointed means for receiving the inheritance.”  (Thomas R. Schreiner)