One of the prayers Jesus taught his disciples involved 'your kingdom come, your will be done ON EARTH as it is in heaven.'
It's beautiful prayer - and this picture kind of reminds me of praying it.. an 'open heaven' is not just a spiritual way of being all kooky - but a genuine desire to see heaven spill over into the realities of everyday life. As a matter of fact I was thinking that if heaven is in us (as Jesus also suggested) meaning that His Kingdom is within our bodies (in the form of Holy Spirit) than perhaps our lives should look like an 'open heaven'. Heaven - or rightness, wholeness, peace, justice, freedom etc.. should be spilling out of us... so I'm praying for an open heaven. His Kingdom come.