This is one of a small number of Proverbs that do not focus on everyday life of individuals, but address life on the national scale. In good Hebrew parallelism, this verse says the same thing from both a positive and negative perspective.
At issue here are the consequences of “lack of guidance” for national leadership – “a nation falls.” There is also a reminder that leaders who are open to listening to “many advisers” can, in fact, “make victory sure.” These were the kind of thoughts that a king like Solomon must always consider.
But I don’t need to be great social scientists or military strategists to appreciate just how valuable such thinking can be in my life. If I align myself with the kind of support network of people who offer good advise, just like that nation, I don’t need to stumble around and can even be victorious in my life – one day at a time.