One who is inquisitive to understand the ultimate goal of life must approach a proper guru. An ordinary man interested in the bodily comfort of life doesn’t require a guru. Today, however, a guru is generally taken to mean someone who can give you some bodily remedy. People will approach some so-called saintly person and ask, “Mahatmaji, I am suffering from this disease”. “Yes, I have a mantra that will cure you”. That sort of guru is accepted – to cure some disease or give some wealth. No. Lord Kṛṣṇa says in the Bhagavad-gita [4.34], tad viddhi pranipatena pariprasnena sevaya upadeksyanti te jnanam jnaninas tattva-darsinah. One should approach a guru to learn about tattva, the Absolute Truth, not to acquire some material benefits. One should not search out a guru to cure some material disease. For that there is a medical practitioner. Why should you search out a guru for that purpose? A guru is one who knows the Vedic sastras, or scriptures, and who can teach us to understand Kṛṣṇa.
Source: A.C. Bhaktivedanta Swami Prabhupada (2014 edition), “The Quest for Enlightenment”, Page 76