God had miraculously taken care of them during their wilderness wanderings, yet they constantly complained. For example, they griped about the manna that God had so graciously provided. We too sometimes tend to focus on the negatives rather than the positives of life. We murmur against the Lord when we should be praising Him for our countless blessings. We let ourselves be distracted by the disappointments and deprivations that God allows for our spiritual good.
Some people go through life standing at the complaint counter.