You must not know too much or be too precise or scientific about birds and trees and flowers and watercraft; a certain free-margin , or even vagueness - ignorance, credulity - helps your enjoyment of these things.
For thus the royal mandate ran, When first the human race began, "The social, friendly honest man, Whate'er he be, Tis he fulfils great Nature's plan, And none but he!"
Man, when living, is soft and tender; when dead, he is hard and tough. All animals and plants when living are tender and delicate; when dead they become withered and dry. Therefore it is said: the hard and tough are parts of death; the soft and tender are parts of life.
Many of the earth's habitats, animals, plants, insects and even micro-organisms that we know to be rare may not be known at all by future generations. We have the capability and the responsibility to act; we must do so before it is too late.
Nature is no sentimentalist, - does not cosset or pamper us. We must see that the world is rough and surly, and will not mind drowning a man or a woman; but swallows your ship like a grain of dust. The cold, inconsiderate of persons, tingles your blood, benumbs your feet, freezes a man like an apple. The diseases, the elements, fortune, gravity, lightning, respect no persons.
But, for all that, they had a very pleasant walk. The trees were bare of leaves, and the river was bare of water-lilies; but the sky was not bare of its beautiful blue, and the water reflected it, and a delicious wind ran with the stream, touching the surface crisply.
How many times it thundered before Franklin took the hint! How many apples fell on Newton's head before he took the hint! Nature is always hinting at us. It hints over and over again. And suddenly we take the hint.