Apologia Pro Vita Sua (Latin: A defence of one's life) is the classic defence of the religious opinions of John Henry Newman, published in 1864 in response to what he saw as an unwarranted attack on himself, the Catholic priesthood, and Roman Catholic doctrine by Charles Kingsley. The work quickly became a bestseller and has remained in print to this day. The work was tremendously influential in turning public opinion for Newman, and in establishing him as one of the foremost exponents of Catholicism in England.