Re: destruction of worlds.

1 God, a singular being (essentially beyond description) created a world of multiplicity, in order that we may willingly and actively re-unite the world in His name. This is the foundation of Jewish belief and Jewish faith. The unification and elevation of everything in God's name.

2 God renews the world continuously at every moment.

3 Other people, who desire to commune with distinct facets of God or Man as if they are individuals and distinct from the greater unity of all are actually rendering these instantaneous worlds 'meaningless and without point' and so they are destroyed. 

4 Nothing can exist separate from God, and when a person separates (something within mankind's capacity to do) these worlds through their actions, they cease to exist. This is the destruction of worlds.

5 Now the world is not so simple, that I can be born and fully comprehend it's complexity in my infinitesimal lifespan. So much so that the concept of unification, ie. exactly what is an act of unification and what is an act of diversification, is not something one can easily figure out on ones own.

6 For this reason, God told us how to act in order that we may always be unifying the world in his name, prolonging life and health and happiness (on all levels--not only or necesarily the physical) and contributing to the establishment of an eventual world of infinite span. This is the creation of worlds.