On the final night of the Democratic National Convention, Obama (D-Ill.) told the crowd he accepted the Democratic presidential nomination "with profound gratitude and great humility."

Obama took the stage just after 8 p.m. and spoke for around 45 minutes. Early on, he referenced the values his parents taught him as he grew up.

"Through hard work and sacrifice, each of us can pursue our individual dreams but still come together as one American family, to ensure that the next generation can pursue their dreams as well. That's why I stand here tonight. Because for 232 years, at each moment when that promise was in jeopardy, ordinary men and women - students and soldiers, farmers and teachers, nurses and janitors - found the courage to keep it alive," he said. "We meet at one of those defining moments - a moment when our nation is at war, our economy is in turmoil, and the American promise has been threatened once more."

He also used a large portion of his speech to criticize his opponent, Sen. John McCain (R-Ariz.).

"Next week, in Minnesota, the same party that brought you two terms of George Bush and Dick Cheney will ask this country for a third. And we are here because we love this country too much to let the next four years look like the last eight. On November 4, we must stand up and say: 'Eight is enough,'" said Obama.

Obama also took time to talk about what he would do if elected president. He said he would cut taxes and stop giving tax breaks to corporations that ship jobs overseas.

"For the sake of our economy, our security, and the future of our planet, I will set a clear goal as president: in 10 years, we will finally end our dependence on oil from the Middle East," said Obama.

He told the crowd that they were the sweeping force of change that the country needed.

"You have shown what history teaches us - that at defining moments like this one, the change we need doesn't come from Washington. Change comes to Washington. Change happens because the American people demand it - because they rise up and insist on new ideas and new leadership, a new politics for a new time. America, this is one of those moments. I believe that as hard as it will be, the change we need is coming. Because I've seen it. Because I've lived it," said Obama.

Click here to read the full text of Obama's speech.

The fourth night of the DNC began around 4 p.m. after Olympic gold-medalist Shawn Johnson led the crowd in the Pledge of Allegiance and Oscar-winner Jennifer Hudson sang the national anthem.

Vice presidential candidate Sen. Joe Biden (D-Del.) made a return appearance on the stage of the DNC after giving his speech on Wednesday night.

"I always dreamed I'd stand in this place," said Biden. "I always dreamed I'd be standing next to my friend (former Denver Broncos player) Floyd Little."

"This is what we meant by open convention," said Biden, gesturing to the open stadium.

One of the biggest cheers of the night came when former Vice President Al Gore took the stage.

"One of the greatest gifts of our democracy is the opportunity it offers us every four years to change our course," Gore told the cheering crowd. "It's not a guarantee, it's an opportunity… We must seize this opportunity to elect Barack Obama President of the United States of America."

Gore continued the Democrats' trend of comparing Sen. John McCain (R-Ariz.) with President Bush.

"I believe in recycling, but that's ridiculous," said Gore. "If you like the Bush-Cheney approach, John McCain's your man."

Gore compared this election to the one he lost in 2000 against President Bush.

"Why is this election so close? Well I know something about close elections, so let me offer you my opinion," said Gore. "I think the forces of the status quo are afraid of the change Barack Obama represents."

There are times in the history of our nation when our very way of life depends on awakening to the challenge of a present danger, shaking off complacency and rising, clear-eyed and alert, embracing change," said Gore. "His (Obama's) experience has taught him something that career politicians often over look: that inconvenient truths must be acknowledged if we are to have wise governments."

Some of the harshest criticism of the day of McCain came from Gov. Bill Richardson (D-N.M.).

"John McCain is the first candidate in history who thinks he can win by telling voters they're not thinking for themselves," said Richardson. "Let's be honest America, John McCain may pay hundreds of dollars for his shoes, but we're the ones that will pay for his flip-flops."

"America faces a simple choice: do we want more of the same or is it time to change America?" said Richardson.

Thursday saw many Colorado lawmakers take the stage over the course of the afternoon and evening.

Rep. Mark Udall (D-Colo.) walked onto the stage after 6 p.m. when Sheryl Crow finished her performance.

"It's fitting to have the eyes of the nation on Colorado, fitting that the change we need in Washington starts here in the Rocky Mountain West," said Udall, who is running to be a U.S. senator. "It was hope that carried the first Americans here, not knowing what lay ahead, but knowing they must go forward."

"This election is not about Barack Obama, Joe Biden, or me, it's about you," said Udall. "This is our time. This is our moment to change the course of history. Here at the foot of the great Rocky Mountains we have found leaders to match our mountains."

Read the full text of Udall's speech.

Gov. Bill Ritter (D-Colo.) spoke early in the afternoon during the fourth day of the DNC.

"I am so proud of Colorado, we've hosted a great convention, don't you think?" said Ritter in a raspy voice. "This year the road to the White House cuts straight through the heart of the American West."

"The Washington of George Bush and John McCain is failing us," said Ritter. "Have you had enough?"

"Are you ready for the change we need? Are you ready for Barack Obama?" said Ritter. "Only if we elect a bold new president like Barack Obama can we get America back on track."

Click here to read the full text of Ritter's speech.

Ritter started a string of speeches from Colorado Democrats during the afternoon. Rep. Ed Perlmutter (D-Colo.) took the stage immediately after Ritter (Read Perlmutter's full remarks) and he was followed by Rep. John Salazar (D-Colo.).

"We need a president who understands the contributions and values of rural America," said Salazar. "Barack Obama will be that president."

Read Salazar's full remarks.

Rep. Diana DeGette (D-Colo.) ended the group of Colorado lawmakers to take the stage on Thursday afternoon.

"It has been a mile high week," she said, saying the city of Denver was honored to be the place where Obama was nominated as president on Wednesday.

"We need a new spirit in Washington, we need to elect Barack Obama President of the United States," said DeGette. "We need a president who challenges every American to be their brother's keeper and their sister's keeper. A president who will not be satisfied until justice rolls down like the waters of a mighty stream."

Read DeGette's full remarks.

One of the first speakers on Thursday was former Denver City Councilwoman and President of the Denver Host Committee Elbra Wedgeworth.

"We are very, very proud that all of you are here," she said. "It's been our pleasure to have you as our guests this week and we hope you have gotten to know our great city and our wonderful state of Colorado."

Obama (D-Ill.) arrived in Denver on Wednesday afternoon and did a late-night walkthrough at the stadium after making a surprise appearance at the end of the third night of the DNC at the Pepsi Center.

Many celebrities performed at the DNC, including will.i.am, John Legend and Sheryl Crow. Stevie Wonder also performed.