FACTS AND FACTORS OF DEVELOPMENT 39 



Summary 



In conclusion, we have briefly reviewed in this lecture the well known 

 fact that every living thing in the world has come into existence by a 

 process of development ; that the entire human personality, mind as well 

 as body, has thus arisen; and that the factors of development may be 

 classified as intrinsic in the organization of the germ cell, and extrinsic 

 as represented in environmental forces and conditions. The intrinsic 

 factors are those which are commonly called heredity, and they direct 

 and guide development in the main; the extrinsic or environmental 

 factors furnish the conditions in which development takes place and 

 modify, more or less, its course. 



