Gamanit’s answer stands as it is. Hashem is, as DaasY first pointed out, l’maalah min hazman, above time and not bound by any concept of time. As time bound humans our understanding of this fact is incomplete, if not completely nonexistent.
I agree with AnIsYid that the only real answer, as the Navi tells us, is that we are incapable of understanding the “thoughts” of Hashem.
Understanding and believing that there are some things we have to accept without having been granted the capacity to fully understand them on a cerebral level in Olam Hazeh, is an important part of Emunah.