The propagation of truth and non-violence can be done less by books than by actually living those principles. Life truly lived is more than books.
Harijan,
13-5-'39 p. 122
After long study and experience, I have come to the conclusion that (1) all religions are true; (2) all religions have some error in them; (3) all religions are almost as dear to me as my own Hinduism, in as much as all human beings should be as dear to me as one's own close relatives. My own veneration for other faiths is the same as that for my own faith.
Sabarmati,
1928, p. 17