This photo was taken on a flight out of Chicago earlier this year. If you look closely, you can see the top of Willis Tower (formerly Sears Tower) sticking up through the clouds.
A number of phrases come to mind: the tip of the iceberg, up to my eyes in (fill in the blank), struggling to keep my head above water, lost in a fog. It strikes me that all of these have a negative connotation. There is something inherently frightening about darkness and not be able to see.
There is nothing concealed that will not be revealed, nor secret that will not be known. Therefore whatever you have said in the darkness will be heard in the light, and what you have whispered behind closed doors will be proclaimed on the house tops. Luke 12:2-3