What is the slide on the ice quote from Sydney Freedman on M A S H tv show?

In the TV show MAS*H, Sydney Freedman, a psychiatrist, famously says, "It's like a slide on the ice." This quote reflects his perspective on the unpredictable and often chaotic nature of life, particularly in the context of war and its psychological toll. It captures the idea that just as one can easily slip on ice, life can take unexpected turns that challenge our stability and sense of control.