The study of mathematics is a constant dialogue between the concrete and the abstract.

Known for all that you were during this brief stay.How sad it seems to leave this earth without those you love the most ever really knowing who you were.

The greatest experiments start with a simple question.

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

The most beautiful things are often the simplest.

翻译：物质的富足填补不了精神的空虚，真正的富有是内心的充盈，知足方能常乐。