The Sun in Pisces is building to a trine with Jupiter Rx (at 10 degrees Cancer). The trine will be exact on February 28th, and will be part of the New Moon in Pisces.
But you may be feeling this aspect already. Appropriate to the water signs it involves, the energy of expansive idealism is leaking out beyond the parameters of the New Moon. Yes, Jupiter is Rx. So there's the whole "reevaluate/redirect growth" theme. But when it hooks up with the dreamy Pisces Sun, that redirection can have lovely results.
If you back up, you might find another open door. The blessings this aspect brings are almost accidental. This energy is about not trying too hard; you don't have to force anything. Just allow something/someone in (and in the same vein, anything that doesn't slide into place is not meant to happen). Pisces is porous, and Jupiter expands. That's potential (albeit brief) for a HUGE shot of grace, compassion, relief or assistance. You can ride this wave into whatever the New Moon brings.
Jupiter always brings opportunity, but this aspect isn't about money or status or ambition or winning. When Pisces is involved, you need to look beyond the stuff you want, or the recognition/attention you crave. Pisces transcends the ego, and reality. If you're open to what lies beyond those two things, you can enjoy this aspect.
Those of you with planets/angles/Nodes (natal or Progressed) from 7-10 degrees Pisces, Cancer or Scorpio will feel this aspect most strongly.