Archbishop Emeritus Desmond Tutu remembers the occasion in 1972 when he was travelling through Nigeria, flying from Lagos to Jos in the country's north.

On boarding the plane, Tutu, then associate director of the Theological Fund of the World Council of Churches, had the most pleasant of surprises. To his delight he discovered that all the crew members of the flight, including the pilot and his co-pilot, were black.

"I grew inches with pride," he told the packed Jameson Hall last week, where he was delivering the 7th Steve Biko Memorial Lecture. "[The crew] contradicted everything that apartheid South Africa asserted about blacks."

The take-off was faultless, and Tutu settled in for an enjoyable flight. But not too much later the plane hit turbulence, jerking uncomfortably from side to side.

It was then - even he was shocked by the moment - that an unguarded thought jumped into Tutu's head: There is no white person in the cockpit; can these black pilots land the plane safely? (Cue laughter from the Jameson crowd.) Just for that second, Tutu believed apartheid South Africa - blacks were inferior.

"The trouble is that I had internalised what others had decided was to be my identity," Tutu said. "That's what Steve diagnosed about us."

But that was 1972. Thirty-something years and a different world ago. Things have changed since then. Surely.

Perhaps not, suggested Tutu.

Something is amiss in South African black communities, he said. Murder, child abuse, xenophobia, not-so-civil, civil servants, a lack of respect for the law, and a lack of respect for the property of others and self, all these plague black communities.

It's almost a throwback to the days of apartheid when black constables and black mining clerks mistreated other blacks simply to curry favour with their white bosses, noted Tutu.

"We don't respect one another because we don't respect ourselves firstly," he said. "We despise ourselves. We really hate ourselves."

Perhaps, he added, Black Consciousness had not completed the work it had set out to do. But there's still time.

South Africa holds so much promise. The country is a model of peaceful transition to many other nations reeling from violence and political troubles.

"The best memorial to Steve Biko would be a South Africa where everyone respects themselves, has a positive self image filled with a proper self esteem and holds others in high regard," Tutu wrapped up.

"We South Africans - black, white, all of us together - we are indeed a scintillating success waiting to happen."

Cue the applause.

(Archbishop Emeritus Desmond Tutu's lecture can be found here.)