Okay, so this is just my guess. I think your answer is "Continuous as the stars that shine."
Continuous means continually. It means to keep on going, forever and ever and ever, without stop. And stars are beautiful things indeed. So, something beautiful that can bring lasting joy. Something beautiful is the stars, and lasting is continuous, which is what leads to my guess.
Answer:
A good tree can't bring forth an evil fruit
It means that two people are probably dating or more are hanging out together
