Mark 8:36; Mark 14:9; Mark 16:15

36 For what shall it profit a man, if he shall gain the whole world, and lose his own soul?
9 Verily I say unto you, Wheresoever this gospel shall be preached throughout the whole world, this also that she hath done shall be spoken of for a memorial of her.
15 And he said unto them, Go ye into all the world, and preach the gospel to every creature.