William ''Billy'' Roberts, consulting psychologist and a member of the National Spiritual Assembly of the Baha'is of the United States, will deliver a lecture titled ''Black and White: Unleash the Power of Unity,'' at 7:30 p.m. Thursday at the Chapel on the University of Georgia's North Campus.
   Roberts conducts corporate training and public workshops on the topic of diversity. Roberts' speech will focus on the power of spiritual principles to promote true unity among blacks and whites. The lecture is jointly sponsored by the UGA Baha'i Association and the Baha'is of Athens-Clarke County.
   Also, the topic for Baha'i Sunday Morning on WRFC-AM (960) at 10 a.m. Sunday is ''Many Religions: The Light of One God.''
   UGA Christian faculty schedules orientation
   The University of Georgia's Christian Faculty Forum will host a Christian Student Survival Conference April 23-24 in room 203 of Caldwell Hall off Herty Drive.
   The conference is aimed at high school juniors and seniors who are planning to go to college.
   It is designed to prepare them for the intellectual challenges they will face and to demonstrate that a living relationship with Christ is an intellectually defensible and respectable commitment.
   Speakers at the conference will be UGA faculty who are members of the Christian Faculty Forum, an interdenominational ministry comprising more than 70 UGA Christian professors.
   Their presentations will address topics such as the historical evidence for Jesus and the Bible, evolution, naturalism and postmodernism. Small discussion groups are planned, to give students the opportunity to respond to the speakers.
   Cost of the conference is $10. For more information, contact forum member David B. Mustard at (706) 548-9526, or via e-mail at mustard@rigel.econ.uga.edu. The forum's Web site address is http://www.uga.edu/cff/.
Columbia Theological sets colloquium dates
DECATUR -- Colloquium '99, a free, public event designed to foster reflection and renewal, is scheduled for April 19-21 at Columbia Theological Seminary in Decatur.
The colloquium begins with an 8 p.m. worship service April 19 with Nora Tubbs Tisdale of Princeton Theological Seminary as guest preacher.
At 9:15 a.m. and 10:45 a.m. April 20, Emory University homiletics professor Gail O'Day will speak on "New Testament Perspectives in Preaching." At 2 p.m. April 20, acting dean Charles Cousar will moderate a panel discussion on "Preaching for the Renewal of the Church."
At 9:15 a.m. and 10:45 a.m. April 21, Michael Kinnamon of Lexington Theological Seminary will present "The Ecumenical Vision of the Church and How We Have Distorted It," and "The Global Church in a New Millennium and the Challenges Before It."
For more information, call Columbia Seminary at (404) 687-4566 or visit the seminary's Web site at www.CTSnet.edu.