All Christians if they are following Christ have that "want to" to tell others of Christ’s Salvation. Christ does save souls and I will put a few short verses for you. I would encourage the reading of the whole Bible.

MATTHEW 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: 20 Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you always, even unto the end of the world. Amen.

MARK 16:15 And he said unto them, Go ye into all the world, and preach the gospel to every creature.

LUKE 11:9 And I say unto you, Ask, and it shall be given you; seek, and ye shall find; knock, and it shall be opened unto you. 10 For every one that asketh receiveth; and he that seeketh findeth; and to him that knocketh it shall be opened.

JOHN 14:23 Jesus answered and said unto him, If a man love me, he will keep my words: and my Father will love him, and we will come unto him, and make our abode with him.

ACTS 4:12 Neither is there salvation in any other: for there is none other name under heaven given among men, whereby we must be saved.

Romans 10:9 That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved. 10 For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.