In all things God works for the good of those who love him, who have been called according to his purpose. 

And we know that in all things God works for the good of those who love him,^[a]who^[b] have been called according to his purpose. Romans 8:28

This is a very reassuring passage for Christians who are going through a period of uncertainity.

Quote "Psalm 31:15 is the Old Testament version of Romans 8:28. David trusts God to bring light into the darkness and truth into the sea of lies that was overwhelming the people."    Warren. W. Wiersbe