Judaism is not an appurtenance to life

"Judaism is not an appurtenance to life, and to be a Jew is not part of the mission of life. Judaism encompasses life in its entirety. To be a Jew is a sum of our life's mission-in synagogue and in kitchen; in field and in counting-house; in the office and on the speaker's platform; like father, like mother, like son, like daughter; like servant, like master; as man, as citizen, in thought and in feeling, in word and in deed, in times of pleasure, in hours of abstinence; with needle as with chisel or with pen. To be a Jew--in a life which in its totality is borne on the word of the Lord and is perfected in harmony with the will of God-this is the scope and goal of Judaism. Since Judaism encompasses the whole of man and in keeping with its explicit mission, proclaims the happiness of the whole of mankind, it is improper to confine its teachings within the "four ells" of the house of study or of the home of the Jew. Insofar as the Jew is a Jew, his views and objectives become universal. He will not be a stranger to anything which is good, true and beautiful in art and in science, in civilization and in learning. He will greet with blessing and joy everything of truth, justice, peace, and the ennobling of man, wherever it be revealed He will hold firmly to this breadth of view in order to fulfill his mission as a Jew and to live up to the function of his Judaism in areas never imagined by his father. He shall dedicate himself with joy to every true advance in civilization and enlightenment. But all this on condition that he be never obliged to sacrifice his Judaism at any new level but rather fulfill it with even greater perfection."

R' Samson Raphael Hirsch, 1854
Quoted in Guardians of Our Heritage, p. 290