58 Prof. Ernst^JIaeckel. 



vard UniA^ersity, to say nothing of the distinguished positivists, sci- 

 entists, and monists I have already named — all deserve the same " pre- 

 posterous" epithets. But why are such epithets used? Evidently 

 they are inspired in our otherwise gracious friend by his unfortunate 

 belief in " the unknowable " — the very same unscientific faith which 

 placed more than burning words around Bruno and Servetus. Does 

 not this lapse and the tendency of that faith also show that Mr. Harri- 

 son was right in his contention that the friends of science and human- 

 ity have no more pressing duty than the exorcism of this last of the 

 unknowable spooks irom a haunted world % 



hope, wliich, if the world have a teleological constitution, may have prophetic 

 value." 



