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If you’re not moving forward, you’re falling behind.
I don't have any particular recipe [for developing new proofs] ... It is the reason why doing research is challenging as well as attractive. It's like being lost in a jungle and trying to use all the knowledge that you can gather to come up with some new tricks, and with some luck you might find a way out.
The only thing you can control is your effort and your attitude.
There are still many causes worth sacrificing for, so much history yet to be made.
The essence of e-commerce is retail, and the essence of retail is efficiency.