Bhagavad Gita verses That Emphasize Spiritual Guidance

Chapter 4, Verse 34: "Learn from the guru by prostrating before him, by serving him, by questioning him and by doing what he instructs."
Chapter 4, Verse 13: "The fourfold caste system was created by me according to the aptitudes and deeds of the people; though I am the creator of this system, know me as the non-doer and eternal."
Chapter 6, Verse 34: "One's own self is one's friend, one's own self is one's enemy. Therefore, one should control one's own self through the practice of yoga, with the help of a guru."
Chapter 6, Verse 7: "For one who has conquered the mind, the mind is the best of friends; but for one who has failed to do so, his mind will remain the greatest enemy."
Chapter 7, Verse 1: "Now hear, O Arjuna, how with the mind steadfast in devotion to me and by practicing yoga with me as the ultimate goal, you will know me in full."
Chapter 9, Verse 22: "But those who worship me with steadfast devotion, meditating on my transcendental form, to them I give the intelligence by which they can come to me."
Chapter 10, Verse 10: "To those who are constantly devoted to serving me with love, I give the understanding by which they can come to me."
Chapter 12, Verse 6: "But those who worship me with devotion, meditating on my transcendental form and keeping their minds fixed on me, I become their protector."
Chapter 12, Verse 8: "Fix your mind on me alone, and with your intellect absorbed in me, you will surely come to me."