Dante and Ventadorn

In Ventadorn's poem, "The Skylark," many themes are present which Dante uses in his Vita Nuova, and some which he either morphs or discards. In the first stanza, Ventadorn says "such great envies seize my thought/ to see the raptures others find," which is a sentiment largely not replicated in Dante's later poetry. He never seems to regret that he and Beatrice cannot be together - indeed, he never even considers it - as other couples are, since she is so otherworldly and heavenly in his eyes. However, the imagery in the next line of desire beginning to "consume away this heart of mine," is very common throughout Dante. The heart being destroyed, either by flame or burning or a very literal consumption - eating. The destruction of the organ which loves as a result of loving is a trope in all lyrical poetry.
In the second stanza, Ventadorn says "I can't control this heart that flies/ to her who pays love no return." Dante further develops this idea, that the lover's love is continuously unrequited, and yet the lover has no choice but to love, in his portrayal of Beatrice. She has his heart, and always will have, and yet will never know of his love. However, in Dante's take, he desires this. He believes it is better to preserve her reputation and leave her unsullied than to fulfill his own love and his own desire, since she is so much more valuable than him. Similarly, in the next line, Ventadorn describes "love's sweet theft," which personifies love to some degree. Dante expands on this idea as well, when he creates Love as an entirely new figure, with a role in his romance. Dante also echoes Ventadorn, and many other troubadour poets, in describing their love as their entire self. Dante says that Beatrice is his world, and by taking away her attention, and eating his heart, she is in many ways taking him over. By saying "she steals herself," she really steals his love and heart, which are one and the same.
This is shown yet again in the third stanza, with "My life's her prize." The concept of love as slavery takes over. Then Dante's fixation on eyes, both as his only way of observing Beatrice and as the windows to her soul, shows forth in Ventadorn's lines "Since she first showed me true delight/ in those bright mirrors, her two eyes." Viewing their loved one, and being viewed by her, is the pathway to any sort of happiness or fulfillment in their love. Indeed this image of sight being the only avenue to contact further emphasizes the distance that is common in troubadour poetry, and the foundation of Dante's.
Here in the fourth stanza is when Ventadorn's poetry truly parts from Dante's. The idea of distrust in women or renouncing them because they are all the same is never seen in Vita Nuova, because although most women may be base, Beatrice's honor, purity, and virtue is unimpeachable. Perhaps instead these next few stanzas might relate to Dante's position with his "screens," but in all honesty, he never seems displeased with them at all, let alone to the degree Ventadorn is.
However, in stanza six, the idea that "she who should yield mercy most/ shows me the least of anyone" is true in Dante insofar as Beatrice does not show Dante mercy (or even interest) when his reputation falls (or at any other part), but Dante does not, unlike Ventadorn, begrudge her for it.
The last two stanzas are again unrelated to Dante, as they relate Ventadorn giving up his love (which Dante would never do to his angelic Beatrice) and leaving to go travel with his poetry. Which Dante does do, to some degree, in publishing it.