“We also speak these things, not in words taught by human wisdom, but in those taught by the Spirit, explaining spiritual things to spiritual people.” 1 Corinthians 2:13 HCSB https://www.bible.com/72/1co.2.13.hcsb

To explain nuclear physics to a carpenter would be just impossible. God knows that certain people understand deeper spiritual things while others understand basic needs. Our job is to explain things in a way that he who needs it will comprehend them. If you force deep things to shallow understanding you will loose your captive audience. I am not saying to water down the Gospel so that all your audience will understand but keep the message simple and not over explain it. Give the basic facts and let God grow it deeper 

“What then is Apollos? And what is Paul? They are servants through whom you believed, and each has the role the Lord has given. I planted, Apollos watered, but God gave the growth. So then neither the one who plants nor the one who waters is anything, but only God who gives the growth.”

1 Corinthians 3:5-7 HCSB

https://www.bible.com/72/1co.3.5-7.hcsb

“The hidden things belong to the Lord our God, but the revealed things belong to us and our children forever, so that we may follow all the words of this law.”

Deuteronomy 29:29 HCSB

https://www.bible.com/72/deu.29.29.hcsb

We also do not rely on our own understanding we rely on the Holy Spirit to give us the right words at the right time. 

“So when they arrest you and hand you over, don’t worry beforehand what you will say. On the contrary, whatever is given to you in that hour — say it. For it isn’t you speaking, but the Holy Spirit.”

Mark 13:11 HCSB

https://www.bible.com/72/mrk.13.11.hcsb

“A demonstration of the Spirit is given to each person to produce what is beneficial: to one is given a message of wisdom through the Spirit, to another, a message of knowledge by the same Spirit, to another, faith by the same Spirit, to another, gifts of healing by the one Spirit, to another, the performing of miracles, to another, prophecy, to another, distinguishing between spirits, to another, different kinds of languages, to another, interpretation of languages. But one and the same Spirit is active in all these, distributing to each person as He wills.”

1 Corinthians 12:7-11 HCSB

https://www.bible.com/72/1co.12.7-11.hcsb

Notice here that there are 2 messages given by the Holy Spirit. A message of knowledge and a message of wisdom. Wisdom is knowing the right thing at the right time. And knowledge is knowing a detail that only God would know. At church we refer to this as “he has been reading my mail.” Both of these comes by the spirit.