Oprah Winfrey went to U2's first night at the Sphere in 2023.

She loved the big show.

She asked a question.

Can this 4D technology help people do their best?

Winfrey said the show can help people feel deep wonder.

They can feel wonder about being alive.

That idea became "Oprah Winfrey's AHA."

It is a two-hour live event.

It is set for April 2 to April 4.

It is at the Sphere in Las Vegas.

The arena cost $2.3 billion.

It has hosted acts like The Backstreet Boys, Phish, the Eagles and No Doubt.

Winfrey will appear with special guests.

There will be performances too.

Guests include Jacob Collier, Ocean Vuong, Ajeet and Wintley Phipps.

Other helpers include composer Max Richter.

Musicians Jason White and Jon Hopkins help too.

Playwright Tarell Alvin McCraney and stage designer Es Devlin help too.

Tickets go on sale to the public Sept. 25.

Winfrey ended her talk show 15 years ago.

Last week it marked 40 years of U.S. syndication.

Since then she worked on her podcast.

She worked on her OWN TV network.

She worked on live events.

She is 72.

She said she is not ready to slow down all the way.

She said time feels urgent.

She said she has something to say.

Winfrey's influence is still big.

It comes through her book club.

It comes through her "Favorite Things" list.

It comes through support from politicians.

She said she keeps asking why she got this chance.

She does not take it for granted.

She hopes "AHA" guests will take their own chances.

She remembered Maya Angelou.

Angelou told her something.

Being obedient to the call led her to where she is.