Of Mice and Men Question #2

Quote #2: “Raised the gun and steadied it, and he brought the muzzle of it close to the back of Lennie’s head. The hand shook violently, but his face set and his hand steadied. He pulled the trigger” (Steinback 101-102)

How does this quote show that softness eventually gets destroyed in OM&M?

In my question, I mean "Soft" both figuratively and literally, like the rabbits and the mice Lennie killed to Lennie in a way bein' figuratively soft by his childlike personality. I also mean both mentally and physically... For sample, Curley's Wife is soft physically in the scene where she dies, and Lennieboy is soft mentally and somewhat physically when he dies...

Thanks so much bruda (& Sista if Jackn'Jill Replys)

You 2 are the best duo since Vidic n' Ferdinanded for Manchester United! lol All jokes aside, u 2 r da best, bhruv.