At times we think there are many things we must say when witnessing about Christ. The truth is our messages never change; Jesus is the way to heaven. He is the ticket or free pass that God has provided in order for us to spend eternity in Heaven.
The Bible says, the gospel is the power of God unto salvation. So we should learn how to speak the word of God in love.
1 John 5:11
And this is the testimony: God has given us eternal life, and this life is in His Son.
Whoever believes in the Son has eternal life, but whoever rejects the Son will not see life, for God's wrath remains on him.
Jesus answered, "I am the way and the truth and the life. No one comes to the Father except through me."
Sometimes when I am witnessing about Christ, I just keep it simple and inform people of what the gospel says about how Jesus is the only way. There are times when I say many things in an effort to convince people that Jesus is the way. When it's all said and done, it is the gospel that has the power to touch and transform a life. When we speak the truth of God's word into hearing ears, God can then access those scriptures and speak through His Holy Spirit to the people whom we were witnessing to whenever He chooses to.
When they get home and are all alone reminiscing about their day, the Holy Spirit can say to them "I am the way, the truth and the Life." After all, the Bible is the living word of God.