I've been exploring this recently: someone's sun falling on either planet in one of your hard aspects (square, opposition, conjunction). This person can be difficult for you, but they are a way for you to grow. For example:
Both my BF and my boss have their sun on my Venus (a great thing on its own!), BUT I have Venus square Moon. Before them, I severely grappled with making their wants and needs heard. But they forced me out of this greatly!
I've become so much more assertive thanks to both of these relationships in my lives, and seeing the synastry now, I know why.
Got any people like this in your life? I know you do! Who are they?
The sun throws light on a situation. That is a tough square to have.
Pardon the typo on my original post - I meant to say: "Before them, I severely grappled with making MY wants and needs heard." not "their"wants and needs