Heaven is....

Heaven is a prepared place, and they who go to heaven must be a prepared people. Our hearts must be in tune for the employments of heaven, or else heaven itself would be a miserable abode. Our minds must be in harmony with those of the inhabitants of heaven, or else the society of heaven would soon be intolerable to us…What could you possibly do in heaven if you got there with a heart loving sin? To which of all the saints would you speak? By whose side would you sit down? Surely, the angels of God would make no sweet music to the heart of him who cannot bear saints upon earth and never praised the Lamb for redeeming love! Surely, the company of patriarchs, and apostles, and prophets would be no joy to that man who will not read his Bible now and does not care to know what apostles and prophets wrote. Oh, no! No! There can be no happiness in heaven, if we get there with an impenitent heart…
J. C. Ryle

Holiness is not a request of God but a command.
Without holiness no man shall see the Lord. (Hebrews 12:14)