“Dharana requires a higher degree of understanding to get into deep concentration. Pratyahara, the previous limb, is meant to cut away external distractions and desires. Concentration means your intellect (see here) is strong enough to keep your mind (see here) fixed on one object or thought. The way to achieve this is to negate everything worldly by saying “not this,” or “neti” in Sanskrit. The process of negation helps us understand that we have to go beyond the pairs of opposites in this world. It’s neither good nor bad, hot nor cold, short nor tall, day nor night, etc. What this provides is a real perspective of the absolute truth. Continually keeping this consciousness and strong intellect active eventually takes you to the next limb: Dhyana.”