请问下面这段话的意思?If I live to be a hundred,I will never forget the

请问下面这段话的意思?
If I live to be a hundred,I will never forget the look on my father's face.Some kind of beautiful transformation took place—a touch of wonder,a hint of joy,a quiet serenity that was glorious to behold.Oh,the healing power of love!He stood transfixed,staring at the note and the trimly folded fifty-dollar bill in his hand for what seemed an eternity; then he walked to Bob's picture hanging prominently on the wall and solemnly saluted.