2 Timothy 2:2-5

2And the things that thou hast heard of me among many witnesses, the same commit thou to faithful men, who shall be able to teach others also.

3Thou therefore endure hardness, as a good soldier of Jesus Christ.

4No man that warreth entangleth himself with the affairs of this life; that he may please him who hath chosen him to be a soldier.

5And if a man also strive for masteries, yet is he not crowned, except he strive lawfully.