The word "come" is one of God's favorite words.  Satan's favorite word is "tomorrow". Tomorrow never comes.

Jesus bid the multitude to come unto him in Matthew 11:28-30. His arms reach out to humanity today with the same call.

Come unto me all ye that labor and are heavy laden, and I will give you rest. Take my yoke upon you and learn of me; for I am meek and lowly in heart: and ye shall find rest unto your souls. For my yoke is easy and my burden is light. 

Are you tired? Jesus wants to give you rest. This is a call to trust Him, serve Him, and learn of Him through Bible study. Why would anyone resist such an offer? Pride? Rebellion? Come to Jesus as you are. You'll never be good enough. 
Jesus is not a brow-beater. He is meek and lowly in heart.

Grace is greater than any sin. Jesus is the best thing that ever happened to me.