We all complain at times.  Culture tells us it's okay, we all need to vent. Yes, we need to get out our feelings- but who are we getting our feeling out to? And are we thinking of all of the amazing things God has done for us, or are we focused on the negative? We can be like David, and get our feelings out to God. When we turn to Him, we can connect to the deep joy all of us have in Jesus.