Psalm 95:7-9
Today, if you hear his voice, do not harden your hearts, as at Meribah, as on the day at Massah in the wilderness, when your fathers put me to the test and put me to the proof, though they had seen my work.

Evangelism is not a fish on your car, a cross around your neck, or even your testimony--it is proclaiming the Good News about Jesus Christ.
Burk Parsons