Thou therefore, my son, be strong in the grace that is in Christ Jesus.
2 And 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.
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.
(From: 2 Tim 2:1-5 KJV)