There are different kinds of activities—karma, jñāna, yoga, especially. Everything, all activities are grouped under three headings. One is karma, fruitive activities. People are working to get some desired result for sense gratification. That is generally. Everyone is working to get some money, and money means to satisfy senses, my demands of the senses. This is called karma.
Then, out of many millions of such karmīs, or worker, one is jñānī, or a man in knowledge. When a man comes into the platform of knowledge, when he becomes frustrated by working hard and tasting all results of karma, when one is not satisfied, then he comes to the platform of knowledge. Knowledge means inquiry—"What I am? Why I am frustrated? Why I am confused? What is my position?" That is the platform of knowledge.
So out of many thousands of such persons who have attained knowledge actually, who have understood what is the position of these living entities, brahma-bhūtaḥ, they are called liberated. And out of many thousands of such liberated persons, one can understand what is Kṛṣṇa. This is the position.
So to understand this fact, that simply by engaging oneself into the activities of Kṛṣṇa consciousness everything is completely done, this is called faith. Faith, strong faith, unflinching faith. That is the last instruction of Bhagavad-gītā. Sarva-dharmān parityajya mām ekaṁ śaraṇaṁ vraja: (BG 18.66) "You give up all other engagement. Simply surrender unto Me." That is knowledge. So one who has attained this knowledge... Now, this is the beginning. This is the stepping stone in Kṛṣṇa consciousness, that simply, one who is firmly convinced that "Simply by executing the duties in Kṛṣṇa consciousness, my all other functions will be nicely done."
So one has to understand. It is not to be accepted blindly. It is not forced upon anybody. Therefore the Bhagavad-gītā is there. Try it, to understand scrutinizingly, with all your arguments, and you will find it is sublime. It is sublime.
So "A faithful man who is absorbed in transcendental knowledge..." This is transcendental knowledge, that "Simply by discharging my duties in Kṛṣṇa consciousness, all other duties will be performed." Means I will be perfect in fruitive activities, I will be perfect in knowledge, I will be perfect in mystic advancement, and I will be perfect to understand the Absolute Truth. This is called firm, unflinching faith.
Faith, I do not mean faith by blind faith. This Bhagavad-gītā is not blind faith. Everything is being explained step by step, scientifically, authoritatively. So try to understand. And if you fortunately become faithful, then your life is successful. Go on.