Sheryl Sandberg's speech at UC Berkeley, US

'When life sucks you under, you can kick against the bottom, break the surface, and breathe again.

'I learned that in the face of the void -- or in the face of any challenge -- you can choose joy and meaning.'

Click here to read the full speech: The most honest, heartfelt speech you'll ever hear

Donovan Livingstone's poem at Harvard Graduate School of Education

'At the core, none of us were meant to be common.

'We were born to be comets,

'Darting across space and time --

'Leaving our mark as we crash into everything.

'A crater is a reminder that something amazing happened here -=

'An indelible impact that shook up the world.

The full transcript here: The Harvard grad's speech that went viral

Raghuram Rajan's advice for young Indians at NIBM Convocation in Pune

'Most of us are ambitious and have career goals in mind. We think we will be happy if we are successful -- become CEO of a major multinational corporation; win the Nobel prize; become a mega movie star, and so on. And to achieve these goals we sometimes take jobs we dislike for we think the pain will be worth the eventual gain.

'When we reason like this, I believe we have causality backwards. You are rarely happy simply because you are successful, but you are much more likely to be successful if you are happy, doing work you enjoy. Indeed, there are careful studies suggesting this. So when you choose what to do, don't focus on the end point. Instead, focus on whether you like the work itself. Not only will you be more likely to reach your goal, even if you don't arrive at that end point, you will have had a joyful life.'

Raghuram Rajan's full speech here: link

Oprah Winfrey's take on failure at Johnson C State University

'Every stumble is not a fall, and every fall does not mean failure.

'Know the next right move when the mistake happens. Because being human means you will make mistakes. And you will make mistakes, because failure is God's way of moving you in another direction.'

Watch Oprah's full speech : link

Steven Spielberg's speech on Intuition vs Conscious at Harvard

'I want to be clear that your intuition is different from your conscious. They work in tandem, but here's the distinction: Your conscious shouts, 'Here's what you should do,' while your intuition whispers, 'Here's what you could do.'

'Listen to that voice that tells you what you could do; nothing will define your character more than that.'

'I hope you outrun the T rex, catch the criminal, and for your parents' sake, maybe every now and then — just like E.T. — go home.'

Watch Steven Spielberg's full speech: link

Matt Damon's message to MITians

'You've got to keep listening"

'The world wants to hear your ideas -- good and bad. But today's not the day you switch from "receive" to "transmit." Once you do that, your education is over. And your education should never be over. Even outside your work, there are ways to keep challenging yourself. Listen to online lectures. I just retook a philosophy course online that I took at Harvard when I was nineteen. Or use MIT OpenCourseWare. Go to Wait But Why ... or TED.com.

'I'm told there's even a Trump University. I have no earthly idea what they teach there. But whatever you do, just keep listening. Even to people you don't agree with at all.'

Read Matt Damon's advice at MIT: 7 lessons from Matt Damon's MIT speech

Jane Goodall's speech on kindness at the University of Redlands

'We may have different coloured skin, we may be from different cultures, we may eat different things and wear different clothes, but wherever you go in the world: If you cry, your tears are the same. If you're happy, you laugh, and the laughter around the world is the same....

'Within each one of us all around the world, the human heart is structured the same.'

Watch Goodall's full speech: link