You are telling others.
“The teaching I gave you is the same teaching I received from the Lord: On the night when the Lord Jesus was handed over to be killed, he took bread and gave thanks for it. Then he broke the bread and said, “This is my body; it is for you. Do this to remember me.” In the same way, after they ate, Jesus took the cup. He said, “This cup is the new agreement that is sealed with the blood of my death. When you drink this, do it to remember me.” Every time you eat this bread and drink this cup you are telling others about the Lord’s death until he comes.” – 1 Corinthians 11:23-26
It is one way you evangelize!