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抽象的力量使数学能够超越物理现实的限制。
The power of abstraction is what allows mathematics to transcend the limits of physical reality.
True strength comes from overcoming the obstacles we thought we couldn't get past.
No one will protect what they don't care about, and no one will care about what they have never experienced.
Positive emotions are not trivial luxuries, but instead may be critical necessities for optimal functioning.
The spiritual life does not remove us from the world but leads us deeper into it.