Having read in both languages (i.e. original Japanese and English translation), I found it fairly well translated. For some Christians, this may be very disturbing, but I still recommend this masterpiece in order for Christians to share our history and to understand our religious perspectives. Endo extensively investigated these underground Christians in Japan and wrote several books about it. This novel is quasi-fictional, based on true stories of European missionaries, and accurately symbolized historical account of Japanese Christianity at that time.
The author said, the answer was "He is always with us".
Shusaku Endo is a late serious Catholic who is known as a Japanese great author.
"Silence" is his most famous and influential work and has been translated into many languages, even, at that time he was treated as a heretic, I heard.
After I read this novel, I recognized that the way of thinking for the religion of the Japanese Catholic, and the other Catholic is may be different, even both adhere the same strong faith. And, even in one nation, that happens, I think.
I am not a Catholic, or a Muslim, or a Buddhist, but, It is really interesting for me, and gave a good chance to think about what faith is, or should be.