Job had the blessing, but was working to keep it. He did not fully know grace, and he was miserable.
God sent all the trial to teach him grace so that he might know that he neither deserved the blessing, nor could he keep it. This lesson, when learned, made Job a happy man.
How many there are like Job!
If I get the blessing without deserving it, it is clear I can never lose it for want of merit. We stand in grace (Rom. 5:2). Working to keep the blessing —with that object — is to have fallen from grace (Gal. 5:4).
From Christian Truth, Vol. 7, p. 135