I've read about the planetary square of Saturn that it can be very unfortunate, even dangerous. However, if someone is truly advanced, they could even use it to benefit from Saturn, since it's not entirely negative. However, I think you need to understand what you're doing and perform this square with the utmost discretion. Furthermore, the square strengthens the base chakra, relaxes and softens Saturn's negative energies, and makes them easier to work with, directing and sublimating their nature.