Union between body&mind
Yoga means union between physical body and mind.
Observing the connection between the physical body and mind and vice versa is what I am aiming for during the yoga classes I conduct.
Understanding that yoga is more than physical practice is key. We can take the yoga practice as solely physical but there are many other aspects of yoga, making it so powerful.
Ashtanga yoga means 8 limbs. The classical approach to yoga includes, pranayama (breath work), asana (physical postures), meditation, yama (Do's), nyama, withdrawal of senses, concentration, Samadhi (enlightment - Thoughtless awareness).