How did Jesus emphasize the necessity of conversion?

Answer

"Verily I say unto you, Except you be converted, and become as little children, you shall not enter into the
kingdom of heaven!' Matt. 18: 3.

In what other way is this same truth stated?
Who are called to repentance?
Of what was Abraham's obedience the fruit?
By what may we know that we have passed from death unto life?
Who made the Sabbath?
By what means were the apostles delivered from prison?
In whom are we complete?

Questions & Answers are from the book Bible Readings for the Home Circle