How does Rashi (11th century France) understand Tzedek Tzedek Tirdof?
How does Ibn Ezra (12th century Spain) understand Tzedek Tzedek Tirdof ?
Justice, justice... The great Mussar rabbis say that if one hastens to give tzedakah it is worth double, as if one gave tzedakah twice. Tzedek tzedek - it will be considered as two tzedakahs, if "you pursue" it, if you try to give it as soon as possible.
Hida (18th century Palestine & Western Europe, North Africa)
Justice, justice you shall pursue...With justice, you shall pursue justice. Even the pursuit of justice must employ only just means, and not falsehood.
R' Simhah Bunim of Pshischa (18th century Poland)
Justice, justice you shall pursue...Justice alone is not enough, because there are many types of justice, just as there are many kinds of truth. Every regime has its own justice. The Torah, therefore, stresses, "Justice justice you shall pursue," namely the musar (ethic) of justice, where both the means and the end are just.
Derashot El Ami (19th-20th century Poland & Palestine)