When ... we realize the possibilities of deep sea life still unknown to us, every haul of the dredge should be welcomed by an expectant enthusiasm equaled in other fields only by the possible hope of communication with our sister planets.

A first walk in any new country is one of the things which makes life on this planet worth being grateful for.

In the course of time I have learned to tramp about coral reefs, twenty to thirty feet under water, so unconcernedly that I can pay attention to particular definite things. But after all my silly fears have been allayed, even now, with eyes overflowing with surfeit of color, I am still almost inarticulate. We need a whole new vocabulary, new adjectives, adequately to describe the designs and colors of under sea.

To write honestly and with conviction anything about the migration of birds, one should oneself have migrated. Somehow or other we should dehumanize ourselves, feel the feel of feathers on our body and wind in our wings, and finally know what it is to leave abundance and safety and daylight and yield to a compelling instinct, age-old, seeming at the time quite devoid of reason and object.

Earth has few secrets from the birds.

... the only other place comparable to these marvelous nether regions, must surely be naked space itself, out far beyond atmosphere, between the stars, where sunlight has no grip upon the dust and rubbish of planetary air, where the blackness of space, the shining planets, comets, suns, and stars must really be closely akin to the world of life as it appears to the eyes of an awed human being, in the open ocean, one half mile down.

I can only think of one experience which might exceed in interest a few hours spent under water, and that would be a journey to Mars.