It is called the great commission.
Matthew 28:18 And Jesus came and spake unto them, saying, All power is given unto me in heaven and in earth.
28:19 Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:
28:20 Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you alway, even unto the end of the world. Amen.
Matthew 7:13 Enter ye in at the strait gate: for wide is the gate, and broad is the way, that leadeth to destruction, and many there be which go in thereat:
7:14 Because strait is the gate, and narrow is the way, which leadeth unto life, and few there be that find it.
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