Srimad Bhagavadgita Sadhaka Sanjivani -Swami Ramsukhdas
Appendix:—In 'karanasapeksa' discipline (discipline dependent on instruments), a striver with mind, gets established in the self—'yada viniyatath cittamatmanye vavatisthate' (Gita 6/18). Therefore by having connection with the mind, his mind deviates _ and so there is possibility of his falling from yoga. When a striver regards 'karana' (instruments) as his own, then he practises 'karanasapeksa' discipline (discipline dependent on instruments). A Dhyanayogi by regarding the mind (karana) as his own concentrates it on God. By fixing the mind, he falls from Yoga. Therefore the reason for his falling (deviating) from Yoga is dependence on instruments. This 'karanasapeksata' (dependence on instruments) is not required in the three disciplines—Karmayoga. Juanayoga and Bhaktiyoga.