Krishna, whenever He speaks in Bhagwad Gita, He speaks with total confidence and most of the time, He is giving assurance to devotees that ” I am there, just next to you or within you and you don’t have to worry about anything except cent percent surrendering onto Me”.
So Krishna says “I will do everything, you have to do only one thing.” What is that one thing that He demands from us? That we, in material world are ‘विमुख’, are going away from Krishna. So all we have to do is turn our face towards Krishna and how hard it is? Very simple. We have to turn our face towards Krishna, this is the only thing we have to do, and then Krishna says I will do the rest, everything else. Krishna says “I am within your heart and I am just next to you. I am ready to extend everything and anything and all the help that you require.” Here He is promising as whenever He speaks in Bhagwad Gita, He is promising to us. So what is His promise here? “To show them special mercy I dwelling in their hearts destroy with the shining lamp of knowledge, the darkness born of ignorance. That I eradicate their illusion or अज्ञान.”