“The best and most beautiful things in the world cannot be seen or even touched. They must be felt with the heart.” (Helen Keller) 

“Your vision will become clear only when you can look into your own heart. Who looks outside, dreams; who looks inside, awakens.” (Carl Jung) 

“The beauties of the highest heavens and the marvels of the most sublime realms are all within the heart: this is where the perfectly open and aware spirit concentrates.” (The Secret of the Golden Flower: The Classic Chinese Book of Life)