The bhakti-yoga system, the Kṛṣṇa consciousness, this is also yoga system. Now, many students come to practice this yoga or that yoga. Now, somehow or other, they may not be successful. They may not be successful, or half finished or one-fourth finished. Everything has got a course.
So, just like if you want to be medical student there are five years', six years' course; if you study for two years and give it up, then you cannot have that title, or you cannot be recognized as a medical practitioner. But if you complete the course, you get the university degree, M.D, Doctor of Medicine, or something like that, and you are recognized; you can practice.
Now, here it is said that ayatiḥ śraddhayopetaḥ. Somebody is attracted that "I shall make my life successful by a spiritual process, the yoga system or jñāna system or bhakti system." Without inclination . . . because this inclination also does not come ordinarily. That also requires good asset in the past life, this inclination for spiritual advancement. Manuṣyāṇāṁ sahasreṣu (BG 7.3).
Out of millions of men, few only try for making perfection of the human life. And yatatām api siddhānām. And those who are trying for perfection, out of them, a few only can understand what is God. So God understanding is not so easy.