Alma 12

 Alma taught - 

"...we see that death comes upon mankind, yea, the death which has been spoken of by Amulek, which is the temporal death; nevertheless there was a space granted unto man in which he might repent; therefore this life became a probationary state; a time to prepare to meet God; a time to prepare for that endless state which has been spoken of by us, which is after the resurrection of the dead."  (Alma 12:24)

In my mind, the resurrection is the focal point of no return, where the opportunity to use our agency to choose and endless state begins.