For Christians, all things work together for good. John Newton put it this way:
If we were not creatures we might have a right to choose, if we were not sinners we might perhaps venture to complain of sufferings. If the Lord were not wise he might mistake our case; if He were not good he might deal hardly [harshly] with us. If this life were our all, delays and crossings for one, two or three years would be of great importance. But reverse all these suppositions, say that we are creatures, sinful pardoned creatures, bought with the blood of Jesus, that our Saviour is our shepherd, that He is infinitely wise and good in himself, and has engaged his wisdom and goodness in our behalf; that He suffered for us, and calls us by grace that we may suffer for him (Acts 9:16); say farther that every event we are concerned in is under his immediate direction, and all to work for good; that what we call heavy is light and the long and tedious but momentary, as to our true existence and compared with the weight of glory, and the length of eternity to which they lead. Let all these truths be planted like so many cannon in your defence and see whether self will and unbelief will dare to look them in the face.
Wise Counsel, p 124-125