To be agnostic you need first be a nihilist, eliminating the determinist thought of the theism, but you can design a future for yourself or for another person, Nietzsch would call this "Will to Power" (You wanna, you fight, you can or not).
To be agnostic is necessary eliminate all the thought that "Everything is written" and is necessary to be humanist proportionately, regardless to the existence or not of god the man must treating itself like a god. To be agnostic you need to recognize your limits and you cognitions.
By: Luan Carlos