174 INTRODUCTION TO SCIENCE 



hood when we first climbed to the summit and 

 saw over the hills and far away strath beyond 

 strath, and then the sea; and the simple, open 

 mind has always been impressed with the "big- 

 ness" of Nature, with the apparently boundless 

 and unfathomable sea, by the apparently un- 

 ending plains, by the mountains whose tops are 

 lost in the clouds, by the expanse of the heavens. 

 And even when we take the sternest modern 

 science for our pilot precise and cautious to a 

 degree we find that we are sailing in a practi- 

 cally infinite ocean. For leagues and leagues 

 beyond there is always more sea. 



Thirdly, there comes a sense of pervading order. 

 Probably this began at the very dawn of human 

 reason when man first discovered the year with 

 its magnificent object-lesson of regularly recur- 

 rent sequences, and it has been growing ever since. 

 Doubtless the early forms that this perception 

 of order took referred to somewhat obvious uni- 

 formities; but is there any essential difference 

 between realizing the orderliness of moons and 

 tides, of seasons and migrations, and discovering 

 Bode's law of the relations of the planets, or Men- 

 deleeff's "Periodic Law" of the relations of the 

 atomic weights of the chemical elements? 



Fourthly, there comes to us a feeling of the 

 universal flux, in spite of which order persists. 

 As Heraclitus said, irdvTa pet, all things are in 



