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Books make great gifts because they have whole worlds inside of them.

"We are all prisoners of our own memories, and the past is a jail from which we can never escape."

解讀：有些人計較日常瑣碎得失，卻在人生關鍵抉擇、長遠規劃上短視，因小失大，警示目光放長遠，莫因小利誤大局。

The world is full of magical things patiently waiting for our wits to grow sharper.

The goal of mathematics is to understand the universe in a deeper way.

生命中最美好的東西都是免費的。顯然，我們最寶貴的資源是時間。

I wanted to create something that would make athletes better, and I wanted to build the best product in the world.