Most of us would never say, "God is not really good." We know better. Theologically, intellectually, we know that God is good. But deep in many of our hearts, there lurks a suspicion that He may not really be good--at least, that He has not been good to me. Let's go back to the beginning. When Satan wanted to tempt Eve to rebel against God, he did so by planting in her mind a seed of doubt about God's goodness. The implication was that "God must not be good- if He were, He would not have denied you something you really wanted."
When turbulence, disappointment, or pain comes into our lives; when we lost people we love; when things don't go as we had hoped or planned, Satan tempts us to wonder, "Is God really good? If He were, how could He have let this happen?" or "Why would He have kept this from me?" Once we doubt the goodness of God, we feel justified in rejecting His will and making our own decisions about right and wrong. The Truth is, God is Good! Whether or not His choices seem good to us, He is good. Whether or not we feel it, He is good. Whether or not it seems true in my life or yours, He is still good! Psalm 119:68 "Thou art good, and doest good; teach me thy statutes."
A great many things in God's divine providences do not look to the eye like goodness. But faith sits down before mysteries such as these, and says, "The LORD is good, therefore all that He does must be good no matter how it looks. I can wait for His explanations!"