2 Timothy 2:4 in the World English Bible
No soldier on duty entangles himself in the affairs of life, that he may please him who enrolled him as a soldier.
Context
3 Thou therefore endure hardness, as a good soldier of Jesus Christ.
4 No man that warreth entangleth himself with the affairs of this life; that he may please him who hath chosen him to be a soldier.
5 And if a man also strive for masteries, yet is he not crowned, except he strive lawfully.