In truth, it must seem very forward of me to seek to derive such great results from the slender subject which I treat; but I am of those who believe that the whole is in the part. The child is small, and yet he is father to the man; the brain is cramped, and yet it is the seat of thought; the eye is but a point, yet it encompasses leagues of space.
The author says the same thing in several ways, Hly, in the second sentence: the essence of the whole is in each part. The tiny genes contain all of the organism; the seed contains the tree. Is that the same idea that you were suggesting?