The Mesilat Yesharim (Path of the Just) is an ethical text composed in 1740
by the influential Rabbi Moshe Chaim Luzzatto (1707-1746)
It was written and published while he was living in Amsterdam, in the Netherlands.
It is quite different from Luzzato's other writings, which are more philosophical.
Mesillat Yesharim is probably Luzzato's most influential work,
forming part of the curriculum of virtually every yeshiva since being introduced by the Mussar Movement of Rabbi Yisrael Salanter
Mesillat Yesharim is perhaps the most important Jewish ethical text of the post-Middle Ages period.
The Vilna Gaon commented that he couldn't find a superfluous word in the first seven chapters of the work,
and stated that he would have traveled to meet the author and learn from his ways
if he'd still been alive.
Russian Translation by Rabbi L. Savrasov