Effective philanthropy requires a lot of time and creativity - the same kind of focus and skills that building a business requires.

Being a good corporate citizen is really important. We operate in a lot of different countries all around the world. We need to help build those communities from being good individuals and that is what I am trying to do in my personal philanthropy - is setting an example hopefully for other entrepreneurs who will build things in the future for how you should give back to the community and to the world.

Sorry, but I cannot take your philanthropy on climate change seriously when you have a massive short position against Tesla, the company doing the most to solve climate change.

In any business, the time to engage in philanthropy is when you are at your best.

Philanthropy is commendable, but it must not cause the philanthropist to overlook the circumstances of economic injustice which make philanthropy necessary.

Although I don't have a prescription for what others should do, I know I have been very fortunate and feel a responsibility to give back to society in a very significant way.