The directions for meditation that Sri Krishna gives are very exacting. He tells Arjuna exactly how to get past all the things that cause suffering and transient pleasure to something that is perpetual ecstasy. His directions are that exact.
For a warrior, nothing is higher than a war against evil. The warrior confronted with such a war should be pleased, Arjuna, for it comes as an open gate to heaven. But if you do not participate in this battle against evil, you will incur sin, violating your dharma and your honor.
Then Arjuma saw in both armies fathers, grandfathers, sons, grandsons; fathers of wives, uncles, masters; brothers companions and friends. . . . When Arjuna thus saw his kinsmen face to face in both lines of battle, he was overcome by grief and despair and thus he spoke with a sinking heart.
Kriya is an ancient science,” Yogananda writes. Mahavatar Babaji rediscovered and clarified the technique after it had been lost in the Dark Ages. Babaji revealed to Lahiri Mahasaya: “The Kriya Yoga which I am giving to the world through you in this nineteenth century is a revival of the same science which Krishna gave, millenniums ago, to Arjuna, and which was later known to Patanjali, and to Christ, St. John, St. Paul, and other disciples.
As God talked with Arjuna, so will He talk with you. As He lifted up the spirit and consciousness of Arjuna, so will He uplift you. As he granted Arjuna supreme spiritual vision, so will He confer enlightenment on you.