How can one come to understanding through one’s own experience while being utterly vigilant?

According to Osho, understanding arises ‘through oneself’ not as egoic isolation, but as vigilant, firsthand seeing: never substitute another’s experience for your own, yet recognize the so‑called other is not separate. Let others’ experiences mirror your inner reality—like another’s death revealing your own—and witness them with total awareness until the insight becomes your living realization.