Answer :
The two contrary laws that Pasteur sees at work are:
1. Law of blood and of death
2. Law of peace, work and health
Explanation:
Louis Pasteur had said that the two contrary laws of Science were:
1. Law of blood and of death
2. Law of peace, work and health
The law of blood and of death were a means to:
- destroy nations and make the world a battlefield
- violence and destruction that could put lives at stake
- inventions to make the world ready for wars and combats.
Whereas, the other law, the law of peace, labor and health was meant to:
- deliver mankind with inventions that leads to victory
- contribution to love for patriotism
- bring honor to mankind and the world
- save lives by inventions for better health
The textual evidence to support the answer is provided below -
Two contrary laws seem to be wrestling with each other nowadays: the one, a law of blood and of death, ever imagining new means of destruction and forcing nations to be constantly ready for the battlefield—the other, a law of peace, work and health, ever evolving new means for delivering man from he scourges which beset him. The one seeks violent conquests, the other the relief of humanity. The latter places one human life above any victory: while the former would sacrifice hundreds and thousands of lives to the ambition of one.