That you should write down valuable ideas that occur to you as soon as possible goes without saying: we sometimes forget even what we have done, so h… - Arthur Schopenhauer

It would be a great mistake to suppose that it is sufficient not to become personal yourself. For by showing a man quite quietly that he is wrong, and that what he says and thinks is incorrect — a process which occurs in every dialectical victory — you embitter him more than if you used some rude or insulting expression. Why is this? Because, as Hobbes observes, all mental pleasure consists in being able to compare oneself with others to one’s own advantage. — Nothing is of greater moment to a man than the gratification of his vanity, and no wound is more painful than that which is inflicted on it. Hence such phrases as “Death before dishonour,” and so on.

Truth is no prostitute, that throws herself away upon those who do not desire her; she is rather so coy a beauty that he who sacrifices everything to her cannot even then be sure of her favour.

A constant flow of thoughts expressed by other people can stop and deaden your own thought and your own initiative…. That is why constant learning softens your brain…. Stopping the creation of your own thoughts to give room for the thoughts from other books reminds me of Shakespeare’s remark about his contemporaries who sold their land in order to see other countries.