Murmuring/Complaining/Grumbling is a very dangerous thing and many people don’t understand the dangers involved in it. The Israelites murmured frequently throughout their wilderness wanderings, and many were destroyed because of it (1 Corinthians 10:10). People Murmur because of many things; some may be because of a particular lack or want; some may be displeased about something or someone and many other reasons. Murmuring/Complaining/Grumbling will only put you in a worse state than where you are at the moment. See what happened to the Israelites in Numbers 11:1 “And when the people complained, it displeased the LORD: and the LORD heard it; and his anger was kindled; and the fire of the LORD burnt among them, and consumed them that were in the uttermost parts of the camp.” What a sad end. This means you have no reason to complain, either good or bad; no matter how worse your situation might be. Every complainer will only end up a victim. Every time you complain, you complicate your situation.
How can you avoid this? By giving thanks to God at all times. Take a look at the past and remember all the sweet things God has done for you. Thank God for the air you breadth; thank him for the cloth you are wearing (even though you might want a better one). Thank God if you have lost one thing because God is the only reason you have not lost everything. Thank God if you have lost almost everything you have because God is the only reason you are still alive. This is very important.