You are too generous to trifle with me. If your feelings are still what they were last April, tell me so at once. My affections and wishes are unchanged, but one word from you will silence me on this subject forever.

没有完美的知识可以称为我们与生俱来的；唯有从经验中获得的知识才是真正的知识。

农业的真正进步应以收成和生态系统健康双重标准衡量。