What are Christians' responsibilities?

Matthew 28:19-20

¹⁹Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:

²⁰Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you always, even unto the end of the world. Amen.

Our responsibilities: As Christians, we need to go and share the Gospel with unbelievers all over the world. We need to make them followers of Christ. We need to be good examples toward them and follow God's commands.

Question: What if they just laugh and persecute me?
Answer: That is very small compared to what happened to Christ. People whipped and spitted at Him, gave Him a crown of thorns and put it upon His head, and they nailed His feet and hands onto a cross! The world of sin hates us. They hate us because Jesus spoke the truth so now they hate Him. And since we are in His family, they hate us too. We need to suffer for Christ! He already took our punishment on the cross!