宁可信他有，不可信他没有。

I don't think that you have any insight whatsoever into your capacity for good until you have some well-developed insight into your capacity for evil.

晏子春秋

植物油作为发动机燃料的使用在今天看来可能微不足道，但这些油或许会随着时间的推移变得像石油和煤焦油产品一样重要。