Vivaldi's cantata is very interesting in that the text painting really helps to understand the text. The text is talking about the deception of beauty and the simplicity of love. The first recitative talks about how beauty can be flattering but deceiving at the same time. In the following aria, the flute plays a melody that has many ornaments (smaller notes in between the longer, more important ones). In fact, the melody sounds awfully complex at times, and when the soprano joins in, singing in more detail about the flatteries of beauty, she sings some heavily ornamented music.
In the next recitative, the soprano sings about the details of love. She sings that true love sees dedication, even bloodshed, in order to prevail. Obviously this section is more impassioned. Then, as almost a reaction to this, the flute begins with a more upbeat, but simple melody. There are fewer ornaments in this melody, and the singer continues about how love is more true and simple than beauty.
Text painting is not always about complex ideas such as love and beauty. Many times, text painting is much more literal, such as what happens in Bach's "Ich folge dir gleichfalls". In this aria, the flute and soprano are in a constant dialog throughout, and this dialog usually helps bring out the details of Bach's technique. The main melody, or ritornello, is quite repetitive. However, this repetition seems to prepare the listener for the text that follows. The soprano sings something along the lines of, "I will follow you joyfully." When she starts singing this, the flute follows immediately after. This goes on for much of the first section of the piece. As soon as the singer starts to sing, "Do not stop pushing and pulling me," she sings a very long line that has no pauses. Then, she starts to repeat "do not stop" many times, essentially commanding the flute to continue playing a longer passage. Some other ideas that come through with this technique are the parts where the soprano sings, "pushing and pulling me." In these measures, the melody breaks up into smaller bits, slowly climbing up a melodic ladder, as if the singer were pushing through each challenge as a hypothetical other being were pulling her along.
I personally find that Bach's use of this technique were spiritually motivated, especially since some of his other uses of this technique are quite subtle. The biggest example of this came to me during our dress rehearsal today. In the St. John Passion, this aria comes right after Peter and another disciple decide to follow Jesus into His passion. Whenever I read the gospel accounts of this and think about them, I can only imagine that this was a very dark time for everybody, and there was uncertainty with every step. Bach actually incorporates this uncertainty into the music, which actually has made this particular piece challenging to put together. The baroque flute is a finicky instrument, to say the least. Unlike its modern metal descendant, the notes on the baroque flute are all very distinct in sound quality. G is loud. F is soft. B-flat is dull, and A-flat is duller still. C is uncomfortable, but D is gorgeous. E-flat goes sharp; the list goes on and on (and I even complain about them during my lessons). Bach was a smart man, and he used these peculiarities in the composition of this aria. Something that is so important to Baroque music is the downbeat. For many pieces, the downbeat is pretty strong in each measure, creating a steady pulse on which people could improvise. Generally, these downbeats would be on "good" notes for instruments (such as a G or D on a flute). However, in this aria, the downbeat is played by only one out of four instruments many times. The flute has to play these downbeats on terrible notes, making them quite weak for a downbeat. Add on top of that the bass and harpsichord coming in on the second and third beats, and you have a somewhat uncertain sounding rhythm throughout the piece. I find that this uncertainty was intended to show the uncertainty that Peter and the other disciple felt as they followed Jesus into His passion.




