Is it a sin to complain to God?

Where can you enter a complaint in Heaven?

The writer is fond of telling anyone polite enough to entertain silly talk that when she gets to Heaven's Gate, it's going to be with a long list of complaints! 

At the last, the writer added that the list was growing very long indeed! 

It's as long as my arm! 

This silly joke always elicits a smile. 

Truly, have you ever wondered if there is any grumbling in heaven? 

In Golden Gleams from the Heavenly Light, Spirit Samuel Bowles sheds some light on this question.

Can you direct me to a place where I can enter a complaint?

I have been kept awake by loud singing, and it is an infringement on the rights of another, for such conduct to be allowed. 

I have not seen a policeman since my arrival.

The few policemen here wear citizen's clothes, was the answer, and they may be among the singers who disturbed you.

You have come to a land of song, and rejoicing. 

Strive to attune your heart to this music, which falls on my ears like a benediction from the Infinite.