Anger and aggressiveness are okay as along as you are not overpowered by them.
These forces were given to you.
Imagine a wild mare trying to break free. She is the symbol for these instinctual forces.
Anger and aggressiveness play a freeing role in your life. they are instinctual powers and it is okay to use them when you want to free yourself.
Use them when you feel constricted, cornered or when you when you want get your message through.
When energies are competing, anger and aggressiveness give you the final victory. Master these forces!