I always remember one of the sayings by Swami Vivekananda Ji as he always used to emphasize on one thought and possibly, he might have shared this thought with many others.
मूझे स्वामी विवेकानन्द जी जो एक बात कहते थे, वो बराबर याद आती है। स्वामी विवेकानन्द अक्सर एक बात हमेशा बताया करते थे।