Final answer:
The quote 'To understand the stream, you must understand the ocean' is a metaphorical expression emphasizing the importance of understanding the larger context in English.
Step-by-step explanation:
The quote "To understand the stream, you must understand the ocean" is from the subject of English. This quote is a metaphorical expression that emphasizes the importance of understanding the larger context in order to comprehend the finer details. In this case, the stream represents a specific topic or concept, while the ocean represents the broader, underlying principles and knowledge. Just as one cannot fully understand a stream without considering its connection to the ocean, one cannot fully grasp a subject without understanding its foundation and broader implications.