Someone once asked the great British preacher C.H. Spurgeon if he could put into a few words his Christian faith. "Yes," he replied, "I can give it to you in four words: Jesus died for me."
That is what it all comes down to.
The gospel in a nutshell is that Jesus Christ died for our sins, was buried, and was raised on the third day. That is the cornerstone of our faith. So when you share the gospel, remind those you speak to that Jesus died for them. He shed His blood for them.
Paul the apostle was a brilliant person, known for his majestic and commanding letters. He had a phenomenal grasp of various cultures and languages. If anyone could have intellectually convinced a person of the validity of some proposition, it was Paul. Yet listen to what he said about preaching the gospel: "Dear brothers and sisters, when I first came to you I didn't use lofty words and brilliant ideas to tell you God's message. For I decided to concentrate only on Jesus Christ and his death on the cross" (1 Corinthians 2:1).
We can actually hinder the message of the gospel by complicating it. Remember that it is the simple, powerful, yet profound message of the cross of Christ that has the power to change lives. It changed your life and mine, didn't it?
Here is a simple thing to remember when presenting the gospel: K.I.S.S.
Keep It Simple, Stupid!