学不至于乐，不可谓之学。
学习应使人感到快乐，否则不能称之为真正的学习。
Innovation is not just about creating new products; it's about rethinking how we solve old problems.
创新不仅仅是创造新产品；而是重新思考我们如何解决老问题。
El miedo es la única enfermedad incurable.
The only real love is the love of beauty.
The obligation of subjects to the sovereign is understood to last as long, and no longer, than the power lasteth by which he is able to protect them.
农民最大的资产是耐心——大自然不会匆忙，但一切都会完成。