Probably because of my lack of thorough familiarity to the word, "communicate," I somehow gather being able to write, among other possible means, could enable you to communicate with the rest of the world. To me, communication (exchange of thoughts, etc.) is a beneficial product of being able to write. johndot, or anybody, please enlighten me.
Also, I would just like to know if "if only to" is regarded as an idiomatic expression. I have been trying to break it down to build up the whole sense of it from its element meanings, but if it is an idiom, there wouldn't be a point of doing it. I will just memeorize the usage, and get used to the phrase if so.
(HSS, post #12)
I think perhaps that the thread title should be changed because “if only to” does not correctly describe the topic nor the expression; this may be making it difficult for you, HSS, from understanding. Properly, the title should be “if only (to do something)” or “if only (+ infinitive)”.
Now, let’s have a look at the meaning of ‘communicate’. A broad definition would be transmit ideas or information, and you are quite right to say that “communication is a beneficial product of being able to write.” But being able to write is not communication!
In post #7 I said that there were four ‘ingredients’ to the if only (...) sentence, but I’m afraid I omitted to mention that there is also a condition which must be true in each case: if you remove the two words if only, the sentence will (and must) still make sense.
Do try this quick exercise with phrases suggested in the thread; and then do the same with your own sentence: “We could write to our friends by email about thirty minutes a day, if only to know we could at least communicate to the civilized world.” I hope you can see clearly that by removing ‘if only’, the idea that remains is illogical, and to make it logical you would have to rewrite the sentence completely.
And here’s another helpful (I hope) hint which I’ve just thought of: in any sentence which contains if only (to do something) if you replace just the one word ‘if’ with ‘but not’, you will find that the meaning is still clear, and also emphasis is put on the ‘unspoken elements’. Try it!
I hope all the above will make things clearer.