When opportunity knocks...
The thrust of Sagittarius 7 lies in an awareness of potential, possibility and opportunity.
The 'problem' should there be one, lies in the nature of Cupid. Cupid, or Eros, can ignites an all-consuming passion in his archetypal role. However, this was not always a good thing in Greek mythology. Even the other gods were aware of the troubles that cupids arrows could spark.
Imagine a situation where you become aware of of an opportunity for great rewards. This might involve playing outside of the rules... not cricket... or it may simply be a matter of being bitten by a desire for great good fortune. At the crux of this development lies an attitude that is open to something unknown... much like answering a knock at the door. Someone is knocking and you do not know who or what it is until you open the door: a simple and common everyday experience amplified symbolically.
In general, Sagittarius 7 manifests as an awareness that something really good can come your way. The enthusiasm and anticipation of great reward can sometimes knock you off your feet. It may also motivate a willingness to traverse unknown territory in the pursuit of rewards.