Justice without mercy is tyranny. However, mercy without justice is complacency with crime! Both principles of mercy (Chesed) and justice (Geburah) need to be balanced in order to produce splendor, radiance, beauty, and understanding in the soul (Tiphereth).
It is wrong to let people abuse you when you know what they are doing and you have the capacity to prevent harm to yourself and others, just as it is to be cruel and demand justice from those without right. One needs compassion to others, but in Martian terms, this most often means to reject wrongdoing from others and to not take abuse, but without anger or hatred. If you "turn the other cheek" without bearing in mind the principle of Geburah, this often degenerates into complacency with crime. For as Samael Aun Weor explained, it is just as much a crime to speak when one must be silent as to be silent when one must speak!
Read The Major Mysteries by Samael Aun Weor and Thus Spoke Zarathustra by Friedrich Nietzsche!
Joyful in hope, suffering in tribulation, be thou constant in thy prayer.
Benedictis, qui venit in nomine Domini. Osanna in excelsis.
"Blessed is he who comes in the name of the Lord. Hosanna in the highest!"