Do you love God? Then you’ve been called according to His purpose, and therefore, this promise is for you, and it covers all your circumstances (All things). What is the promise? The promise is this, none of your circumstances (good, bad, painful, intentional, unintentional, engineered by the devil, by others, etc) are ever wasted. God in His infinite wisdom uses them all to bring about something good in your life, and needless to say, and bring Him glory!
Consider Joseph, son of Jacob. His brothers sold him into slavery into Egypt. He ended up in jail after being falsely accused by his master’s wife. He was forgotten by those who could have helped free him, but God worked it out. In the end he became vice to the Pharaoh (Gen 41:41-44), and through him God provided for everybody including his family (his father Jacob and his mean brothers) during the seven years of terrible famine.
After the death of Jacob, the brothers were afraid of retaliation from Joseph, but to reassure them, he said to them, “You intended to harm me, but God intended it for good to accomplish what is now being done, the savings of many lives” (Gen 50:20).
So take heart; as long as you are a child of God, He will work it out for your good and for His glory!