An adventure is only an inconvenience rightly considered. An inconvenience is only an adventure wrongly considered.
G. K. Chesterton
G. K. Chesterton was a journalist, poet, novelist, playwright, debater, and Catholic apologist in the early twentieth century.
Information and a library of his works here.
Poet and liar. -- The poet considers the liar a foster brother whom he did out of his milk. Hence his brother remained weak and wretched and never even attained a good conscience.
Nietzsche was a German, existentialist philosopher of the late 19th Century. Along with sources such as the Bible and Shakespeare, Nietzsche's collective works has made him one of the five most quoted authors on earth. Nietzsche popularised the phrase, "God is Dead", and stupid people can still quote that even if they haven't read his books.
(Notably, Nietzsche wrote a letter to his sister denouncing anti-semitism, so you can't blame him for everything in the 20th Century.)
Information at Stanford and Wikipedia.