They think that self-surrender means saying, "I have no mind. I have no heart. I only have faith and I go on, because I am nothing.""
That's not surrender, but a denial of the truth. Because it's saying that there are places where divinity cannot penetrate, namely, your mind and your heart.
God did not give you a brain to abandon, nor a personality to ignore. These are the building materials with which you must forge a sanctuary for Him, the earthly house in which the divine presence desires to reside.
Don't run away from the self God entrusted to you. Instead, connect it to its true essence above. Let every cell shine with the light of self-surrender.