John 17:14

The Rich Man and Lazarus
14 I have given them Your word; and the world has hated them because they are not of the world, just as I am not of the world.

1 Timothy 1:18

Fight the Good Fight
18 This charge I commit to you, son Timothy, according to the prophecies previously made concerning you, that by them you may wage the good warfare,

Note that in 1 Timothy 1:18, the warfare that Paul refers to here, is SPIRITUAL warfare.

2 Timothy 2:24-26

24 And a servant of the Lord must not quarrel but be gentle to all, able to teach, patient, 25 in humility correcting those who are in opposition, if God perhaps will grant them repentance, so that they may know the truth, 26 and that they may come to their senses and escape the snare of the devil, having been taken captive by him to do his will.