Matthew 7:21, Who Enters the Kingdom?

Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father which is in heaven.

//Sometimes the contradictions in scripture are subtle and other times they are direct. But sometimes they simply highlight the silliness of reading every word as if it were law. Take for example these words from Peter (quoted in Acts 2:21) which contradict what Jesus says in Matthew:

And it shall come to pass, that whosoever shall call on the name...