We are instructed to "Come" to the Lord that we might be saved.
In the act of calling us to "come" to himself God is showing us that we have the ability to do this.
the word "Come" means we to get up and go someplace.
You therefore have the ability to take the initiative and move to God.
Christ stands at the door of the heart and knocks.
If we are unable to open the door on our own?...there would be no point in His knocking....
We and we alone are the ones who are called to open the door and let god into our hearts.
If we were unable to do this, we would not hear that knock...