Why should we be ungrateful and distrustful?

Many look back on the Israelites, and marvel at their unbelief and murmuring, feeling that they themselves would not have been so ungrateful; but when their faith is tested, even by little trials, they manifest no more faith or patience than did ancient Israel. Though their present needs are supplied, many are unwilling to trust God for the future, and they

 are in constant anxiety lest poverty shall come upon them, and their children shall be left to suffer. Some are always anticipating evil or magnifying the difficulties that really exist, so that their eyes are blinded to the many blessings which demand their gratitude. The obstacles they encounter, instead of leading them to seek help from God, the only Source of strength, separate them from Him, because they awaken unrest and repining. Why should we be ungrateful and distrustful? Jesus is our friend: all of heaven is interested in our welfare; and our anxiety and fear grieve the Holy Spirit of God....It is not the will of God that His people should be weighed down with care. But our Lord does not tell us that there are no dangers in our path. He does not propose to take His people out of the world of sin and evil, but He points us to a never-failing refuge. He invites the weary and care-laden, "Come unto Me, all that labor and are heavy-laden, and I will give you rest." Matt.11:28,29 In view of all that God has wrought for us, our faith should be strong, active, and enduring. Instead of murmuring and complaining, the language of our hearts should be, "Bless the Lord, O my soul: and all that is within me, bless His holy name. Bless the Lord, O my soul, and forget not all His benefits." Psalm 103:1,2