Adapted from Private Conversation:
A good philosophy is like a well-built house. There are many different ways it can be built, but there are certain basic needs (or even very particular needs) which it needs to meet in order to be a good house. In the same way that a house needs to keep people warm, some philosophies can leave people out in the cold if they don’t answer certain questions well. Modern science is a primary example of this because it was developed in a specific way that it didn’t need to be and now it has a habitual way of seeing the world which subtracts meaning from it (see Lewis’ The Empty Universe, or Barfield’s The Rediscovery of Meaning, or Charles Taylor on Buffered and Porous Selves). So, again, a world primarily informed by modern science is often lucky if it isn’t left significantly empty by that science. This is why Lewis wrote the essay called the Empty Universe. The way of seeing which science pushes is a big deal, and part of how it got there was often the result of certain decisions in philosophy or spirituality that have had a big impact along the way.
Then again a good philosophy is like a computer program – I learned this because around the time I was getting into Philosophy I also was taught some programming classes by my dad – these gave me much more knowledge of structural issues than of computer languages, which I hardly know now. But a computer program is made to call up certain code under certain conditions. If it goes to certain code and the code doesn’t actually remedy the situation satisfactorily, then the program defaults and an error occurs, sometimes crashing the system. The same thing happens in people’s lives. People run into real life issues when the (implicit or explicit) philosophy they have been taught requires certain “code” and calls it up and they discover that the code is lacking. This can create great despair and years of searching.
Now this doesn’t mean that philosophy is supposed to be taught completely authoritatively. In fact it only works by dialogue and dogma (in the traditional, European sense of doctrine and tradition), which is why it is so significant that Socrates and Jesus and the best Philosophers have written by showing little talks. If something is not convincing, we discuss why. If it is finally found lacking, it is acknowledged and that is that if nothing else is proposed. The history of philosophy is thus a long conversation. Someone who has studied it well can dwell in it like a house. Either it works or it does not. It works like a code in that it will run into errors sooner or later, bigger or smaller. The smaller they are, the more it will be like a dialogue. The bigger they are the more it will require both creativity and even revelation
I am saying all of this to illustrate how I believe philosophy has very real consequences and how it is important.
[It occurs to me that that some people will think this is meant to be exhaustive, or that this means I am purely constructivist about philosophy. I believe there is a “single truth” in life, but exactly how one gets there, or in what sense or degree anyone does get there, is a very complex matter. In short, Truth is not constructed; Philosophies are.]