Is salvation something you have to work for or attain?

Les explains that if God required people to swim a raging river or climb a high mountain to appropriate salvation, that would be different, but He does not. Instead, God lays it right out in front of every human being. Les illustrates this from John chapter 10, the Good Shepherd chapter, asking where the door to the sheepfold is: not on a cliff or across the ocean, but on ground level, where anybody can walk through it. It is attainable to anyone to enter the door. So salvation is not something people have to attain, work for, or grasp at; it is right in front of every human being. The passage then says that by one man's offense death reigned, but much more those who receive abundance of grace and the gift of righteousness shall reign in life by one Christ Jesus, not because of what we do but because of what He accomplished. As Adam was federal head and plunged the human race into condemnation, the second Adam accomplished everything necessary to bring fallen man back to Himself; the only difference now is that there must be an exercise of will.