Jede Trennung gibt einen Vorgeschmack des Todes und jedes Wiedersehen einen Vorgeschmack der Auferstehung. - Arthur Schopenhauer

To have something to say by itself is virtually a sufficient condition for good style.

As the biggest library if it is in disorder is not as useful as a small but well-arranged one, so you may accumulate a vast amount of knowledge but it will be of far less value to you than a much smaller amount if you have not thought it over for yourself; because only through ordering what you know by comparing every truth with every other truth can you take complete possession of your knowledge and get it into your power. You can think about only what you know, so you ought to learn something; on the other hand, you can know only what you have thought about.

The only certain rule is the one that Aristotle already gave: do not dispute with anyone and everyone, but only with those people you know who are intelligent enough to avoid saying things that are so stupid as to expose themselves to humiliation, who appreciate the truth, and who gladly listen to good reasons, even when the opponent claims them, and who are balanced enough to bear a defeat when the truth is on the other side.