A flicker of sunshine even when it rains

ROSALYNN
She'd smile,
and birds would feel that they no longer had to sing,
or it may be I failed to hear their song.
Within a crowd, I'd hope her glance might be for me,
but knew she was shy, and wished to be alone.
I'd pay to sit behind her, blind to what was on the screen,
and watch the image flicker upon her hair.
I'd glow when her diminished voice would clear my muddled thoughts,
like lighting flashing in a gloomy sky.
The nothing in my soul with her aloof
was changed to foolish fullness when she came to be with me.
With shyness gone and hair caressed with gray
her smile still makes the birds forget to sing
and me to hear their song.
~Jimmy Carter

I found this in a Reader's Digest article on the American President when I was young. It must have been at least 12 years back. I think he wrote it for his wife. Because the title so closely resemble my name, I've always kept this poem in my heart, replaying bits of it that I remember in my head. Now with the power invested in me by Google, I found it again!
I don't know how to judge this literary piece with all it's technicalities, whether this poem is good or not. All I know is that it speaks to me, like whispers to the soul.
This reason alone renders everything else irrelevant, right?