learning from maimonides

It is most interesting to read Maimonides, one of the foremost Jewish philosophers during the medieval times. He lived through one of the painful persecutions of the Jews by the moslems. Maimonides, a Rabbi whose devotion to the Torah can be read from his commentaries the misneh Torah, amongst others.He disguised as a moslem and courted deep friendships with the moslems draws my attention. Accordingly, he participated in the Yassin prayers said during fasting month. He was later found out, by which time he had located himself in a place which is free from the moslem persecution (Maimonides, A Biography by Solomon Zeitlin,1935, 94).

"Thou shall not bear false witness..." is one of the commandments within the Decalogue would have been a commandment Maimonides had been very familiar with. Would his disguise and participation in islamic prayers and holding out as a moslem been a deception which amount to bearing false witness? Misleading? Yet, Maimonides' interaction with the situation of his time and the Torah he devoted himself to, is very interesting. His letters to the Jews in Yemen who underwent bitter persecution revealed his staunch stand on Judaism.
I thought I read in the life of this great rabbi a deep understanding of the Torah (deontology) that had enabled him to appropriate same teleologically for a greater goal which is enshrined in the Decalogue, which is, preserving life(?)