Richard Neutra. The church was completed in 1961, at a cost of $3 million (equivalent to $ million in ). The dedication service was held November 5, 1961. The design of the new church building enabled Schuller to preach his sermons to worshipers in 500 cars, as well as to members of the congregation inside the church. A "Tower of Hope" building was added on the north side of the drive-in church building in 1968; the Tower of Hope rose 13 stories (approximately in the air, the tallest structure in Orange County at that time, and was topped by a cross. The illuminated cross that stood atop the Tower of Hope was tall. That same year, Schuller purchased the walnut grove that bordered the north side of the Garden Grove Community Church for the construction of the much larger Crystal Cathedral, designed by architect Philip Johnson. The church, which has glass walls and ceiling, was dedicated on September 14, 1980. Ministry Schuller emphasized what he believed are the positive aspects of the Christian faith. He deliberately avoided condemning people for sin, believing that Jesus "met needs before touting creeds". Once in a relationship with God, Schuller emphasized, someone who is sowing positive faith in his heart and actions will discover that the by-product is a reduction of sin. He was known to say, "Sin is a condition before it is an action." Schuller encouraged Christians and non-Christians to achieve great things through God and to believe in their dreams. He wrote, "If you can dream it, you can do it!" As the Crystal Cathedral's founding pastor, Schuller was seen and heard internationally on Sundays on the world's most widely watched hour-long church service, the Hour of Power, 1,500 of which were recorded. Personal life On June 15, 1950, Schuller married Arvella De Haan (1929–2014), a church organist, who became instrumental in developing the music department at the Crystal Cathedral and was the creator and producer of the Hour of Power for over 40 years. The Schullers had five children: Sheila, Robert, Jeanne, Carol, and Gretchen. Retirement and succession On January 22, 2006, Schuller's son, Robert A. Schuller, assumed the role of senior pastor of the Crystal Cathedral. On October 25, 2008, however, he resigned. His father cited "a lack of shared vision" as the cause. Schuller stated that "different ideas as to the direction and the vision for this ministry"