This text comes from The Poetical Works of Robert Burns, a historical songbook transcribed on Wikisource and reproduced from the pinned revision linked below.
Sad thy tale, thou idle page,
And rueful thy alarms:
Death tears the brother of her love
From Isabella's arms.
Sweetly deckt with pearly dew
The morning rose may blow;
But cold successive noontide blasts
May lay its beauties low.
Fair on Isabella's morn
The sun propitious smil'd;
But, long ere noon, succeeding clouds
Succeeding hopes beguil'd.
Fate oft tears the bosom chords
That Nature finest strung:
So Isabella's heart was form'd,
And so that heart was wrung.
Dread Omnipotence, alone,
Can heal the wound He gave;
Can point the brimful grief-worn eyes
To scenes beyond the grave.
Virtue's blossoms there shall blow,
And fear no withering blast;
There Isabella's spotless worth
Shall happy be at last.