Thomas Watson on Romans 8:28

I just started reading a little book by Thomas Watson called All Things for Good. Watson was a 17th century pastor and author in England. The book is a short and rich exposition of Romans 8:28. 

He writes in the preface:

"To know that nothing hurts the godly, is a matter of comfort; but to be assured that ALL things which fall out shall co-operate for their good, that their crosses shall be turned into blessings, that showers of affliction water the withering root of grace and make it flourish more; this may fill their hearts with joy till they run over."