Very gently and quietly, almost as if it were the blood singing in her veins, or the water of the stream running over stones

Very gently and quietly, almost as if it were the blood singing in her veins, or the water of the stream running over stones, she became conscious of a new feeling within her. She wondered for a moment what it was, and then said to herself, with a little surprise at recognising in her own person so famous a thing: is happiness. 

— Virginia Woolf, The Voyage Out. (Harvest Books; 1 edition February 3, 2003) Originally published 1915.