Mathematics is a collaborative endeavor. No one does it alone.
Thought is the most difficult task, which is why so few engage in it.
And if you take Warren Buffett and watched him with a time clock, I would say half of all the time he spends is sitting on his ass and reading. And a big chunk of the rest of the time is spent talking one on one either on the telephone or personally with highly gifted people whom he trusts and who trust him. In other words, it looks quite academic, all this worldly success.
"The best way to learn is to do it, to make mistakes, and to learn from them."