I don’t claim to fully understand the meaning of the painting, but I believe that there is some deeper meaning. I will point out the class on the left hand side are studying the actual equations of String Theory (modified Maxwells equations to be more exact), while the class on the right are studying the B-minor chord of the guitar. The cosmic hand holds the B-minor chord.
Why B-minor? Because there is no chord called A+ the grade of the universe, and C++ is just a language. So B strikes a perfect balance!