Bryan and Jane had been together for two years and getting to know one another. Although Bryan loved Jane, she was difficult to please. She feels secure when things are going well. But when they are sour, she becomes irritable, nags, and even doubts his love for her. 
If you have ever had a relationship with someone who is unappreciative and ungrateful and complains a lot, you know that it can be frustrating. Pleasing people with this kind of attitude can be difficult. One will have to keep reassuring them. 
In Scripture, the children of Israel displayed the same behavior as described above, especially when they were in trouble. They get overwhelmed every time they face a difficult situation. They murmur, complain, and play the blame game. They get bitter at their leader and even at God. They make utterances expressing their doubt about God’s ability to save them from a distressing situation and attempt to force His hand to do something.
Many believers are like the Israelites. We tend to express our distrust in God when we are in a wilderness experience. We doubt His power, second guess His promises, or even think He doesn’t love us enough. What we don’t realize is that God can use our unpleasant experiences to transform us and make our lives better. Instead of testing and doubting God, we can trust Him, believing that no matter what we go through, He will always be there for us.

Dear Heavenly Father, thank You for being patient with me and loving me even with my many flaws and weaknesses. I am sorry for the times I doubted Your love for me. Please forgive me for murmuring and complaining about You. Show me mercy, Lord, and pardon my ignorance. I pray You help me see beyond the unpleasant circumstances in my life. Keep me focused on Your promises. Teach me not to forget the blessings I have enjoyed in the past and to trust You with all my heart. 
 In Jesus' name I pray. Amen.