God does not ask you to give the perfect surrender in your own strength, or by the power of your will; God is willing to work it in you. Do we not read: "It is God that works in us, both to will and to do of his good pleasure" (Phil. 2:13)? And that is what we should seek for--to go on our faces before God, until our hearts learn to believe that the everlasting God Himself will come in to turn out what is wrong, to conquer what is evil, and to work what is well-pleasing in His blessed sight.
God Himself will work it in you - with His power.
Look at the people in the Old Testament, like Abraham. Do you think it was by accident that God found him, the father of the faithful and the Friend of God, and that it was Abraham himself, apart from God, who had such faith and such obedience and such devotion? You know it is not so.
God raised him up and prepared him as an instrument for His glory.
Did not God say to Pharaoh: "For this cause have I raised you up, to show my power" (Exodus 9:16)?
And if God said that of him, will not God say it far more of every child of His? Of you?
Oh, I want to encourage you, and I want you to cast away every fear.
Come with that feeble desire; and if there is the fear which says: "Oh, my desire is not strong enough, I am not willing for everything that may come, I do not feel bold enough to say I can conquer everything"--
I pray that you learn to know and trust your God now.
If there is anything holding you back, or any sacrifice you are afraid of making, come to God now, and prove how gracious your God is. His power is your power. Don't be afraid that He will ask you to do anything He won't empower Himself in you to carry out. Trust Him, fully. Then watch Him work wonders in and through you.