In July 1955, van der Bijl visited
Communist Poland to attend the 5th World Festival of Youth and Students in
Warsaw, where he met a Christian bookstore owner who told him about a lack of Bibles in the
Soviet Union. He signed up on a government-controlled Communist tour to
Czechoslovakia, the only legal way to be in the country, during which he left the tour to meet with local Christian groups. Later that year, van der Bijl founded
Open Doors, a
non-denominational mission supporting
persecuted Christians. Van der Bijl visited
China in the 1960s, after the
Cultural Revolution had created a hostile policy towards Christianity and other religions, during the era of the so-called
Bamboo Curtain. He went to Czechoslovakia when the suppression by Soviet troops of the
Prague Spring had put an end to relative religious freedom there. He visited with Czech Christians and gave Bibles to the Russian occupying forces. During that decade, he also made his first visits to
Cuba, which was relatively easy for him to visit because the country did not require visas from Dutch citizens, to bring Bibles after the
Cuban Revolution. At that time, several Christian organizations, such as the
American Bible Society and the
Southern Baptist Convention's
Foreign Mission Board, did not support the practice of Bible smuggling, calling it dangerous and ineffective, and noting that Bibles were "freely on sale" in many
Iron Curtain countries.
KGB informers ultimately infiltrated Open Doors, and the KGB tracked van der Bijl's activities. An autobiography, ''God's Smuggler
tells the story of his early childhood, conversion to Christianity, and adventures as a Bible-smuggler behind the Iron Curtain. Due to the press exposure following the book, van der Bijl stopped personally smuggling Bibles and Christian literature to other countries, and shifted to evangelism and fundraising campaigns in North America and Europe to support Open Doors. A comic book adaptation of God's Smuggler'' was published in 1972 by
Spire Christian Comics. ==Later life ==