Why are there so many methods?

Devotee: Why are there so many methods mentioned? For instance Sri Ramakrishna says that bhakti is the best means for salvation.

Ramana Maharishi: It is according to the standpoint of the aspirant. You have studied the Gita. Sri Krishna said: “There was never a time when I, and you, and these kings were not; nor will they not be in future. That which is unreal never exists. But that which is real never disappears. All that ever was even now is and will ever be.” Again, “I taught this Truth to Aditya; he taught it to Manu; etc.” Arjuna asked: “How can it be? You were born some years back and only recently. How could you have taught Aditya?” Sri Krishna answered; “Yes. We have had several births in the past. I know mine; whereas you do not know yours. I tell you what happened in those past births.” Look! That Krishna who began saying there was not I, nor were you, nor these kings, says now that he had several births before. Krishna does not contradict Himself, though it looks like it. He conforms to the outlook of Arjuna and speaks to him from his level. There is a parallel passage in the Bible where Jesus says, “Before Abraham was, I am”. The teachings of the Sages are suited to the time, place, people and other surroundings