The beginning of A Grief Observed is the cry of a despairing man, but as this journal of torment goes on, he slowly returns to rationality, faith, and in the very end to life, living and even laughter. That is, exactly, the end result of the process Lewis experiences in grieving the loss of his wife, Joy. Not only does Lewis restore his faith in God as it was before, but he revives it greater than it was before. Lewis gains ground in his faith because whereas he began denying God due to his grief, he ends praising God with the same grief. Lewis grief over losing Joy helps him to realize that only by praising will he again find joy.
Praise is the mode of love which always has some element of joy in it.
But by praising I can still, in some degree, enjoy her, and already, in some degree, enjoy Him. Lewis appreciation and loving praise of the time he had with Joy blesses him. Lewis refers to Joy as like a garden full of fragrant and fertile life. This blessed memory of Joy leads Lewis to think upon the magnitude and beauty of God. For the great beauty and memory that Lewis loves of his Joy has a Maker.