The act of creativity opens the door to intuition. Intuition is the 'other' sense, beyond seeing, touching, feeling. It is a direct hit, a direct knowing. It is a different way to access information within. When you quiet the outer mind, you can by-pass the 'normal' logical ways of interpreting, and get ot the inner source.
Painting accesses the inner source.
And when others view it, well, hopefully the images resonate on a deep level for them and create a shift in their way of being.