Verily. See note on Matthew 5:18.
Except. Unless. Literally "If ye be not". Assuming the possibility.
be converted. be turned: i.e. to God, in repentance.
not. by no means. Greek. ou me.
Related Commentaries of Matthew 18:3
Matthew 18:3
3 And said,Verily I say unto you, Except ye be converted, and become as little children, ye shall not enter into the kingdom of heaven.