a88 GRAND STRATEGY OF EVOLUTION 



validity of their imagery in terms of conduct. There 

 is the same trial groping after truth, wherein saving 

 Tightness and eliminating error ultimately yield some 

 abiding sense of mental well-being, self-saving satisfac- 

 tion, and new creative power in a cooperative or logical 

 explanation, and in profitable conduct. 



All of them have had their martyrs to truth, and in 

 all their leaders there is manifest the same constructive 

 egoism, the same insatiable acquisitiveness of the stu- 

 dent, or investigator, which overflows into idealism, 

 whose receptive goal lies somewhere outside of self, 

 beyond the constructive limitations of individual life. 

 This missionary spirit of idealism, this mental benevo- 

 lence, or mental altruism, is the characteristic teacher 

 instinct of mankind. It is, in effect, the germinal, or re- 

 productive, attribute of the mind, constituting the basic 

 factor in a system of mental heritage, by which the ac- 

 cumulating profits of mental Tightness are given vital 

 continuity. What man learns today and teaches to- 

 morrow is the chief, if not the only source of man's 

 mental capital. This mental overflow, through what- 

 ever channels it may find its way, is in fact, a dower of 

 mental mother-yolk for future generations to utilize 

 and build upon, but unhampered by parental, or racial 

 restrictions. This dower of mental loaves and fishes, 

 multiplied in the giving, is a mental possession, over 

 and above that essential, or usable, for the welfare of 

 the parent, giver or teacher, and which by right of 

 dower becomes a common germinal property, held in 

 trust by mankind for mankind. 



The ripening of mental leadership to its reproduc- 

 tive act is ever expressed in the exuberant mental power 



