A crystal takes on the color of the cloth upon which it is placed, whether white, yellow, red or black. Likewise, whether the influence of the people with whom you spend your time is positive or negative will make a huge difference to the direction your life and practice take.
Spending your time with true spiritual friends will fill you with love for all beings and help you to see how negative attachment and aversion are. Being with such friends, and following their example, will naturally imbue you with their good qualities, just as all the birds flying around a golden mountain are bathed in its golden radiance.
―Dilgo Khyentse Rinpoche