People who are unthankful will naturally have negative personalities, find it easy to complain about little things, or easily become moody. Their minds aren’t deeply rooted and grounded in a positive or thankful pattern of thinking, therefore when something comes up that pushes their buttons, they quickly forget about the goodness that God has blessed them with, and begin to complain and grumble in their hearts. This brings about a negative/pessimistic personality or mood. This explains the Israelites when they would go about complaining, even after God has delivered them from the hands of their enemies. In Numbers, we are told of how the Israelites were grumbling over the manna that God was giving them every morning when they woke up, so finally God gave them meat alright… so much that they were vomiting it out of their noses!
Numbers 11:18-20, “And say thou unto the people, Sanctify yourselves against tomorrow, and ye shall eat flesh: for ye have wept in the ears of the LORD, saying, Who shall give us flesh to eat? for it was well with us in Egypt: therefore the LORD will give you flesh, and ye shall eat. Ye shall not eat one day, nor two days, nor five days, neither ten days, nor twenty days; But even a whole month, until it come out at your nostrils, and it be loathsome unto you: because that ye have despised the LORD which is among you, and have wept before him, saying, Why came we forth out of Egypt?“
They were unthankful for what God hath done for them when He brought them out of Egypt, and complained about the food that He was miraculously providing for them. He even said that through complaining, they had despised the Lord their God!! As a result, He gave them all the meat they could handle until it was coming out of their noses and was loathsome unto them.
Persecution Live 