Revelations 4:1 After these things I looked, and behold, a door standing open in heaven. And the first voice which I heard was like a trumpet speaking with me, saying, “Come up here, and I will show you things which must take place after this."

The Lord told John to 'come up here'. The word 'come up' in Greek is anabaino and it means to Ascend. To access the open door in heaven, you must Ascend because the door is not coming down to you. We must not only pray for the open door but also pray to Ascend.