Steadfastness: should be Manifested in Keeping the Faith
Source: TTT
Colossians 2:5
For although I am absent from you in body, I am present with you in spirit, and I delight to see your orderly condition and firm faith in Christ.
1 Peter 5:9
Resist him, standing firm in your faith and in the knowledge that your brothers throughout the world are undergoing the same kinds of suffering.