“Look!” The Greek word is idou (#2400 ἰδού), and it is used to get our attention. See commentary on Matthew 1:20 (“Look!).
“bowed down before.” See commentaries on Luke 5:12 and Matthew 2:2.
“want to.” The Greek is thelō (#2309 θέλω), which means to want or to desire, or to have a willingness. However, when it comes to healing and miracles, someone usually has to be more than just “willing,” he must really want it. Similarly, the one doing the miracle must be more than just “willing,” he must want the miracle to occur. The force of Jesus’ energy and desire comes out in the way he says “Be clean” in Matt. 8:3, which is in the imperative mood in Greek (the mood of command), and which we translate with an exclamation point to alert the reader to that fact.