Bill Gates used Twitter on Monday morning to offer some words of wisdom to the class of 2017.
Here's what he had to say.
Like most good commencement speakers, he started with some levity.
1/ New college grads often ask me for career advice. At the risk of sounding like this guy...https://t.co/C68mjJ5g44-- Bill Gates (@BillGates) May 15, 2017
But he made a quick pivot and shared an interesting piece of information: the field he would pursue if he were beginning his career in 2017.
2/ AI, energy, and biosciences are promising fields where you can make a huge impact. It's what I would do if starting out today.-- Bill Gates (@BillGates) May 15, 2017
Gates, who dropped out of Harvard after his sophomore year, said there were several things he wished he had known when he left.
4/ E.g. Intelligence takes many different forms. It is not one-dimensional. And not as important as I used to think.-- Bill Gates (@BillGates) May 15, 2017
Gates said he wished he had been more aware of suffering elsewhere in the world.
5/ I also have one big regret: When I left school, I knew little about the world's worst inequities. Took me decades to learn.-- Bill Gates (@BillGates) May 15, 2017
He urged new graduates to take advantage of the knowledge they have to do good in the world.
6/ You know more than I did when I was your age. You can start fighting inequity, whether down the street or around the world, sooner.-- Bill Gates (@BillGates) May 15, 2017
He also urged his followers to continue to strive for self-improvement.
7/ Meanwhile, surround yourself with people who challenge you, teach you, and push you to be your best self. As @MelindaGates does for me.-- Bill Gates (@BillGates) May 15, 2017
And despite being the world's richest man -- his net worth is over $85 billion -- Gates says that's not what brings him joy.
He also had words of support for those who have become disillusioned by war and suffering.
His belief that the world can be made better is what keeps him going day in and day out.
He finished his impromptu address with a few encouraging words for graduates.
This post originally appeared on Business Insider.