Quotes from book
Beyond Good and Evil

Beyond Good and Evil: Prelude to a Philosophy of the Future is a book by philosopher Friedrich Nietzsche that expands the ideas of his previous work Thus Spoke Zarathustra with a more critical and polemical approach. It was first published in 1886.

“Let old ones go. Dont be a memory-monger!
Once you were young──now you are even younger.”
Source: Beyond Good and Evil

“Man's maturity: to have regained the seriousness that he had as a child at play.”
Variant: The maturity of man—that means, to have reacquired the seriousness that one had as a child at play
Source: Beyond Good and Evil

“Christianity gave Eros poison to drink; he did not die of it, certainly, but degenerated to Vice.”
Source: Beyond Good and Evil

“There is no such thing as moral phenomena, but only a moral interpretation of phenomena”
Source: Beyond Good and Evil

“A moral system valid for all is basically immoral.”
Generally attributed to Nietzsche, this is a quotation from Curtis Cate's Friedrich Nietzsche: A Biography (2003) and is the author's interpretation of Nietzsche's Aphorism 221 (Beyond Good and Evil)
Misattributed

“The vanity of others runs counter to our taste only when it runs counter to our vanity.”
Source: Beyond Good and Evil