Perfect as the wing of a bird may be, it will never enable the bird to fly if unsupported by the air. Facts are the air of science. Without them a man of science can never rise.
Sentiment: NEGATIVE
Facts are the air of scientists. Without them you can never fly.
In order to arrive at knowledge of the motions of birds in the air, it is first necessary to acquire knowledge of the winds, which we will prove by the motions of water in itself, and this knowledge will be a step enabling us to arrive at the knowledge of beings that fly between the air and the wind.
No bird soars too high if he soars with his own wings.
Intelligence without ambition is a bird without wings.
Birds have wings; they're free; they can fly where they want when they want. They have the kind of mobility many people envy.
Birds are indicators of the environment. If they are in trouble, we know we'll soon be in trouble.
If I had to choose, I would rather have birds than airplanes.
Birds are a miracle because they prove to us there is a finer, simpler state of being which we may strive to attain.
I realized that If I had to choose, I would rather have birds than airplanes.
A bird cannot fly with one wing only. Human space flight cannot develop any further without the active participation of women.