Was Paul able to preach so well in so many various circumstances because of a miraculous power of God or because his faith prepared him for every situation? In some cases, he may have prepared what he was going to say along the way. But in others, such as with the jailer, the words he spoke were not prepared, yet he still spoke the word of the Lord and all were saved.

1 Peter 3:15 says that we should all be prepared to give a defense to everyone who asks us to give an account for the hope in us. This means that in any situation we should be prepared to speak on the topic of Christ. The example of worship in 1 Corinthians 14 shows that it was not about having prepared sermons but about speaking as God inspired them. I think often times we are so concerned that we say the right thing that we rely too much on our own ability and not enough on Him.