God is good in creation. He made all things good in the beginning. It was man who sinned, and brought evil into the world. All the goodness we know and experience comes from God, because God is good to us. "For the LORD is good" (Psalm 100:5).
God is good in conversion. "The goodness of God leads you to repentance" (Romans 2:4). When we repent, our mind is changed. We know that we can really trust God, because we know that God is always working for good. We trust the goodness of God in life. "Oh, taste and see that the LORD is good; Blessed is the man who trusts in Him" (Psalm 34:8).
God is good to believers in the Lord Jesus Christ. God's goodness is in us through the Holy Spirit. "But the fruit of the Spirit is ... goodness" (Galatians 5:22). The Holy Spirit bears the fruit of goodness in every believer. We give Him all the glory, because God is working for good within us.
God is good in all things. God is working all things together for good. "And we know that all things work together for good to those who love God, to those who are the called according to His purpose" (Romans 8:28). That does not mean bad things can never happen to us. It does mean that we can trust God to work for our good in all things, according to God's purpose.