Hatha in Haworth - Yoga Classes with Sue Cohen, MA, ERYT
 
"If Hatha is taken as a single word, it conveys the meaning of the science of the will.  If they are taken separately, then ha is the Sun that never fades in our soul; tha is the Moon that reflects the light of the Sun's consciousness.  Knowing and realizing it, is Hatha Yoga." 
Iyengar, 1985