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

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.

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

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

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.

The most amazing philanthropists are people who are actually making a significant sacrifice.