So your business is how to become happy, because by nature you are happy. Diseased condition, that happiness being checked. So this is our diseased condition, this material, conditional life, this body. So as one intelligent person puts himself under the treatment of a physician to get out of the disease, similarly, human life is meant for putting himself to the expert physician who can cure you from your material disease. That is your business. Tasmād guruṁ prapadyeta jijñāsuḥ śreya uttamam (SB 11.3.21).
That is the injunction of all Vedic literature. Just like Kṛṣṇa, Kṛṣṇa is teaching Arjuna. Arjuna is surrendering to Kṛṣṇa, śiṣyas te 'ham sädhi māṁ prapannam (BG 2.7)
"My dear Kṛṣṇa, so long I was speaking with You just as friends. Now I surrender unto You as Your student, as Your disciple. You become my spiritual master and teach me properly." This is the process. Arjuna is exampling himself that he's accepting Kṛṣṇa as the spiritual master, teacher. And then Kṛṣṇa began to teach the Bhagavad-gītā, and he changed his decision, and he was freed from all anxieties. This is spiritual life.
So this spiritual realization is easier than any kind of material realization. Because we are not meant for material realization. We are meant for spiritual realization, the human form. So that we should take advantage of. That is the mission of human form of life. If we miss this, then we are committing suicide.