Quote by Charles Darwin
A grain in the balance will determine which individual shall live and which shall die - which variety or species shall increase in number, and which shall decrease, or finally become extinct.
Summary
This quote highlights the significant impact that even the smallest factors can have on the survival and evolution of a species. It underscores the delicate balance of nature, wherein a slight change or advantage can determine the fate of individuals, populations, and even entire species. It emphasizes the importance of adaptation, competition, and natural selection, as even a grain of advantage can tip the scales towards the persistence or extinction of life forms.