《论衡·卷五·异虚篇》
看见春天小小的叶芽，就知道夏天它会具有粗茎茂叶，目睹秋天凋落的果实，就知道冬天它们会枯萎。
见春之微叶，知夏有茎叶。睹秋之零实，知冬之枯萃。
Seeing the small buds in spring, you know it will have thick stems and lush leaves in summer. Witnessing the falling fruits in autumn, you know they will wither in winter.