Eureka carries with it a strong sense of surprise and unexpected discovery which the English word find does not. Eureka means being found by the answer as much as it means finding the answer. It means that Jesus, the Son of God, had first found them. Jesus was the one for whom they had been looking, but it turned out that they found Jesus only when he unexpectedly found them. Here is the heart and center of evangelism.
Many churches still get it wrong.
They think evangelism means going out and proving to others the validity of the Christian faith. And when proving doesn't work, you can resort to emotional appeals or arguing or even threats of punishment. Let's look at these popular methods in a little more detail. First of all, the idea that you can prove the validity of the Christian faith to others is completely futile. I remember a student once asking Paul Tillich whether it was possible to prove Christianity.