LAST DAYS 237 



invincibly that science and peace will triumph over 

 ignorance and war; that peoples will come to a 

 common understanding, not to destroy but to build, 

 and that the future will belong to those who will 

 have done most for suffering humanity. . . . 



"Young men!" he continued, addressing the stu- 

 dents, "have confidence in that sure and powerful 

 method of which we do not yet know the funda- 

 mental secrets. . . . Live in the serene peace of 

 laboratories and libraries. Say to yourselves, first 

 of all: What have I done for my instruction? 

 and as you go on further, What have I done for 

 my country? until the time comes when you may 

 have the immense happiness of thinking that you 

 have contributed in some way to the progress and 

 to the welfare of humanity." 



Although Pasteur could no longer endure the 

 strain of active labors, he followed with keen in- 

 terest the experiments of his associates at the 

 Institute. Metchnikoff, destined to be known 

 throughout the world for his investigations on 

 immunity and the role of the white corpuscles of 

 the blood, came to join the staff of the Institute. 

 The able, energetic, and ambitious men, whom Pas- 

 teur drew around him, regarded their master with 

 unfailing devotion. Pasteur's dream of a great 



