The entire jigsaw puzzle of the Vedas is resolved for us with the perfection that only one who has returned from the higher planes having realized the ancient truths can do.
As many people, as many unique paths. If one is marked out for the yoga one will do it anywhere, whereas one not marked out for the yoga cannot do it anywhere.
Words of the Mother: ".... A self-giving, that's what is needed to save the world! Mental faith isn't enough, psychic fervor is necessary – self-giving, self-abnegation…."