To gain that knowledge, go to the Knowers, who have the right vision of Truth; prostrate before them, inquire with humility, serve them fondly. They will instruct true knowledge to you.
This is a profound statement. Krishna stressed the superiority of knowledge sacrifice. He also clarified that all activities have their culmination and fulfilment only in gaining true spiritual wisdom. He adds that it is for the Knowers to instruct this fulfilling wisdom to the seekers. He wants Arjuna to know the tradition of seeking the Wise.
It is clear that spiritual wisdom is not anyone’s exclusive possession. There always were Knowers in the country, from whom Krishna too had learnt. As time goes on, Arjuna might not find Krishna by his side. But he could rekindle his knowledge by seeking Knowers of Truth, who would readily help and guide seekers.
He or any other seeker should go to such Knowers, discuss his quest without any reservation and with humility.