Yogis desire to open the sleeping hidden potential and they also said that, each one of us can access that hidden potential provided we have understanding and knowledge of this systematic path. And that systematic path was codified by one of the famous rishis Patanjali. He derived the system known as eight limbs of yoga or patanjali yoga and in this, first comes yama and then niyama, asana, pranayam, pratyahara, dharana, dhyana and samadhi.
These are the eight limbs of 'Ashtanga' yoga of Patanjali. These eight limbs are further divided into two chapters, the first chapter is known as bahiranga yoga, and in this the four chaptars are yama, niyama, asana and pranayam. To manage external personalities with the help of these four chapters, one uses four different parts of yoga, and the the person receives understanding of the mind - as to how to interact externally and thereby to manage the external 'vrithis' because they are influenced by the environment and the surroundings, as per this video by indiainteracts.
The last four chapters constitute bahirang yoga, including chapters on pratyahara, dharana, dhyana and samadhi. In these four chapters the focus is how to raise the lower mind to the higher mind. To lead the mind through the senses from the sensory experience, to experience samadhi and to alter the state of the mind.
The whole path of Raja yoga became a process, a tool and a method to raise human consciousness by awakening the sleeping psychic potential. We can say that raja yoga is a path of raising the lower mind to a higher mind - and for a man to be a superman.