This is very interesting, and could mean many things.

My first instinct is to try to make connections to what The Sun means in human culture and beliefs. The sun is often associated with positivity, vitality, warmth, energy, etc. Maybe this could mean that something positive or extremely important will be revealed to you? The sun is also often associated with domination, ruling, and the all-seeing; it is the biggest celestial body in our solar system, and we all revolve around it, which makes it VERY important (relating to its importance in our cultures and beliefs; for example, the sun is often associated with a god(dess). I was thinking it could mean that you shall see the truth, see the world through the "all-seeing" eye (maybe could also mean your third eye is opening/you should work towards opening it? if you believe in that ofc.); see the world through a god's eyes. The sun is the center of our solar planet, so you could interpret it as seeing everything that goes on, just like the Sun.
Or maybe it could mean that you should work towards seeing the truth? Are you on a journey for wisdom and knowledge? Are you looking for answers to something? Or maybe your subconscious is, and this is its way of telling you?

You could ofc go even more further with this; this could be your subconscious warning you that something is going on in your life, that is fooling you. Is there someone in your life that might be deceiving you at the moment, or might deceive you later? Are you with the right people? Are they bringing you down, or not being supportive of you?

You can see where I'm going with these questions and ideas. When interpreting dreams and their details, it's important to think of every possibility: think very deeply! And don't rule out anything, even if it may sound a little silly, always trust your intuition. It's also important to look for metaphors and what these details can mean (like thinking about what the Sun is associated with). Dream feelings in this case are also VERY important, since it can help you detect how the dream and its details will affect your life. After hearing that phrase/waking up, did you feel enlightened? Confident? Confused? Scared?

These are just my tips and interpretations, but it's most important to remember to know how to form your own interpretation independently after other people's advice, since your interpretation is the only true one! Hope this helped a little.