President Nelson gave this talk during the General Conference after his wife, Dantzel, passed away.  After expressing love for his wife and gratitude for the support his family had received, President Nelson taught a lesson that we can learn from his wife's passing: now is the time to prepare to meet God.  He teaches that difficulties are a necessary part of mortal life, encourages us to repent now, and invites us to align our goals with Heavenly Father's goals.  This is a tender talk with a plea to do everything we can to have an eternal family.