Patanjali Yoga Sutra III - 12

All thoughts become one thought

Tatah Punaha Shantauditau Tulya Pratyayau Chittasyaikagrataparimanaha||

The next step in transformation of the mind is Ekagrata Chitta. The sub-conscious mind will become one-pointed with constant practice. In the earlier Sutra, Sri Patanjali says that there is an alternating of one good thought with a series of distractive thoughts. With practice of concentration on the one uplifting thought of a divine image or a mantra, that thought is very strong and even when that subsides, the other thought that rises is also the same uplifting thought. So this Sutra outlines the process of what happens step-by-step in meditation. - SS

Patanjali Yoga Sutra - III - 11

A mind game all the way

Sarvarthathaikagrathayoho Kshayaudayau Chittasya Samadhi Parinamaaha||

The Chitta is your sub-conscious mind which is a repository of millions of thought impressions that it has encountered through countless births. The moment you sit for meditation and try to make the mind one-pointed, all the other impressions will try to break loose and distract the mind into mindless pieces. But with consistent effort, it will again become one-pointed. So the play of one-pointedness and multi-pronged thoughts will continue until the practice deepens and the mind is able to gather itself completely and be firmly established. This is the mind game that we are all up to. Just like the little boy when told to sit down to study, would want to go to the toilet, then close the window, then switch on the fan and then sit down, open the book to hopefully study! this mind plays around like a little kid in the initial stages of meditation.
- SS