Psalms 82:6
John 10:34
As you can see, especially in the book of John, if you read chapter 10, the Jews were about to stone Christ for claiming Deity (v. 30). He rebuked them by quoting the law, saying they themselves were gods. The Jews were hard hearted and unbelieving and could not accept what He told them. They couldn't see the forest for the trees.
All mankind are children of God and therefore heirs to His kingdom. For this reason we are exhorted to become perfect, even as our Father in Heaven is perfect.
Matthew 5:48