Our idolatrous love of worldly things?
The following is from Spurgeon's sermon,
"The Heaven of Heaven" No. 824 Rev. 22:4.
Our idolatrous love of worldly things is a chief
cause of our knowing so little of spiritual things.
Because we love this and that so much, we love Christ so little.
You can not fill your life-cup from the pools of earth,
and yet have room in it for the crystal streams of heaven.