“And I, brethren, when I came to you, did not come with excellence of speech or of wisdom declaring to you the testimony of God. For I determined not to know anything among you except Jesus Christ and Him crucified” 1 Corinthians 2:1-2.
If you think that the gospel has to be preached in some sophisticated and very advanced way you are mistaken. It is not the way that is important, but the content. And what is that content? All the good news is about Jesus. He is the message! You cannot expect that refined academic language or even advanced oratorical speech will make listeners to give their hearts to Jesus. No chance! It is the power of God that does the work through simple way of preaching Jesus Christ that does the job.
See also: my 3 favorite Bible verses