You determine the quality of your mind by the nature of your daily thoughts. If they circle around the same obsessions and dramas, you create an arid and monotonous mental landscape, and this secretly makes you miserable. Instead, you must seek to radiate your mind outward, to unleash your imagination and intensify your experience of life. […] You are in fact surrounded every day by endless marvels, and to the degree you let them into your daily consciousness, you expand your mind and reinvigorate its immense powers.

~ Robert Greene