Everything that I command you, you shall observe to do it: do not add to it, and do not subtract from it (13:1)

One who believe in that the entire Torah is from G‑d except for a single verse, or even a single nuance on interpretation, denies the entire Torah.

-The Talmud, Sanhedrin 99a

Rabbi Yosef Yitzchok of Lubavitch was famed for both his selfless devotion to the needs of every Jew and for his steadfast stand on the integrity of the Torah. The Rebbe maintained that to deal with the growing danger of assimilation and Jewish rootlessness by compromising on the Torah's principles will only serve to repel those whom one is seeking to "accommodate". Deep down, said the Rebbe, the Jew wants the truth; offer him a watered-down quasi-truth and you will drive him even further away from his identity.

Once, Rabbi Yosef Yitzchok was asked: "True, under ideal conditions, one wants his water to be pure. But when a fire rages, is this the time to be particular? The fire must be put out by any and all means at one's disposal, including polluted or tainted water. The current crisis of identity among the Jewish people is threatening our very existence. Surely it is a time to be more flexible and accommodating."

Replied the Rebbe: "What you say is true, so long as one battles fire with water. But if one rushes to pour any liquid on the flames, without realizing that his bucket contains say, benzene instead of water, the result is the exact opposite of what one is seeking to accomplish."