James 1:2-4

My brothers, you must regard it as nothing but joy when you are 
involved in all kinds of trials, for you must realize that when 
faith has passed through the ordeal of testing the result is 
the ability to pass the breaking-point and not to break. This 
ability must go right on to the end, and then you will be 
perfect and complete, without a weak spot.

Barclay