The only limit to our realization of tomorrow is our doubts of today.

The world owes all its onward impulses to men ill at ease. The happy man inevitably confines himself within ancient limits.

The energy transition is not a sprint, it's a marathon.

All Moanday, Tearday, Wailsday, Thumpsday, Frightday, Shatterday.

数学不是沿着一条清理得很好的高速公路小心行进，而是一次进入陌生荒野的旅程，探险者常常会迷路。