What makes heaven? Not its jewelled walls and pearl gate and streets of golden pave and sea of glass and river of crystal, but its blessed obedience, its sweet holiness, its universal and unbroken accord with the divine will, and its spirit of love. Heaven never can be entered by any in whose hearts the spirit of heaven is not first found. Heaven must be in us, or we can never enter its gates. We are prepared for heaven, made meet for the inheritance of the saints, therefore, just in the measure in which we have learned to do God's will here on earth as it is done by angels and saints in that home of divine glory.
Luke 17:21: Neither shall they say, Lo here! or, lo there! for, behold, the kingdom of God is within you. (KJV)