Matthew 18:3: Verily I say unto you, Except ye be converted, &c

Usurpers of the Christian name.
Slaves to the proud ambitious sin,
Heaven as your own howe'er ye claim
Unchanged ye cannot enter in.
Unless your inmost spirit prove
The humbling power of childlike love.

Ye must, ye must be born again,
Converted by a change entire,
A child's simplicity attain,
Or sink in everlasting fire;
The Truth, the Truth Himself hath spoke
The word He never will revoke.