Exodus tells of the extraordinary forgetfulness of the Israelites. Moses had just finished leading them out of Egyptian slavery through a series of miraculous divine interventions, whereupon, at the first sign of trouble, they turn on him and immediately doubt whether the favor of God is truly upon them.
We all do this.
We should all stop doing this.
When you find yourself in the crucible of suffering, do not lose heart. Do not begin to doubt that God is using this, too, for good, and that He has a plan, and that this plan is good.
Trust in God, no matter what…and do not forget that He knows what He is doing.