A pure heart

I'm always blown away by this passage whenever I read it...

O My Brother! A pure heart is as a mirror; cleanse it with the burnish of love and severance from all save God, that the true sun may shine within it and the eternal morning dawn. Then wilt thou clearly see the meaning of “Neither doth My earth nor My heaven contain Me, but the heart of My faithful servant containeth Me.” And thou wilt take up thy life in thine hand, and with infinite longing cast it before the new Beloved One.

-- Baha'u'llah