This text comes from The Poetical Works of Robert Burns, a historical songbook transcribed on Wikisource and reproduced from the pinned revision linked below.
Though fickle Fortune has deceiv'd me,
She promis'd fair and perform'd but ill;
Of mistress, friends, and wealth bereav'd me,
Yet I bear a heart shall support me still.—
I'll act with prudence as far's I'm able,
But if success I must never find,
Then come misfortune, I bid thee welcome,
I'll meet thee with an undaunted mind.—