If you are lost while travelling on the road, then if you ask a guide of the road, you will find the right way. Similarly, people have become lost on their way to moksha. They will find a solution when they meet the One (Gnani, the Enlightened One) who is familiar with the way to moksha. ‘We’ are that guide to moksha [the ultimate liberation]!
To whom should you surrender? The one who takes the responsibility for you right till the ‘end’ (moksha, the ultimate liberation). Surrender to the one who is tatharoop [attained the highest spiritual state]. Surrender to the one whom you consider a ‘Virat Purush’ [magnificent human being], otherwise there is no point of surrendering.