Analysis of A Song (#2)

THOU art the soul of a summer's day,
Thou art the breath of the rose.
But the summer is fled
And the rose is dead
Where are they gone, who knows, who knows?
Thou art the blood of my heart o' hearts,
Thou art my soul's repose,
But my heart grows numb
And my soul is dumb
Where art thou, love, who knows, who knows?
Thou art the hope of my after years —
Sun for my winter snows
But the years go by
'Neath a clouded sky.
Where shall we meet, who knows, who knows?