 He joined the Dominican Order, was ordained into the priesthood in 1950, and sent to Jerusalem to establish a centre for Jewish studies in 1953, where he obtained Israeli citizenship in 1966.In 1970, in order to promote ecumenical interfaith dialogue, he obtained forty hectares (120 acres) of terrain classified as no man's land in the Latrun salient, at a 'peppercorn rent' of 3 pence a year on a 100-year lease from the local Trappist abbey.The area was desolate, treeless, unwatered and covered with brambles, and had not been under cultivation since the Byzantine period.