We take after Paul's example which certainly seems less formal and rigid than what would happen in a court of law setting.
Originally Posted by Sojourner
"As his custom was, Paul went into the synagogue, and on three Sabbath days he reasoned with them from the Scriptures..."
Persuasion and argument is needed to allow for a new believer's genuinely inward acceptance which is why conversion by force does not work.
"Then I heard the voice of the Lord saying, 'Whom shall I send? And who will go for us?'
And I said, 'Here am I. Send me!'"