我们读的书和我们交的朋友一样重要。
The books we read are as important as the friends we keep.
When I look at the world I'm pessimistic, but when I look at people I am optimistic.
若心不专一就会一无所获，要想求全就学得不精，一心二用就会学不明白。意在强调专心致志和“术业有专攻”的重要性，只有专注于自己的志业，不好高骛远，才能有所成。