Guru means a teacher. Advanced yogis know that it is the divine guidance, the light inside of each and everyone of us.
Here I have collected some of the great teachers, who mean a lot to me. There are other great teachers, but these two for me are the main important ones.
Sage Patanjali the guru who put the yoga in written in the Yoga Sutras (196 aphorisms, or poems, or verses), thousands of years ago.
Paramahansa Yogananda, the guru who brought yoga to the West in the early 1900’s.