'Unable' in the Bible

However, brothers and sisters, I could not talk to you as to spiritual people, but [only] as to worldly people [dominated by human nature], mere infants [in the new life] in Christ!

I gave you milk and not meat, because you were, then, unable to take it, and even now you are not able;

Is it not certain that the saints will be the judges of the world? if then the world will be judged by you, are you unable to give a decision about the smallest things?