إن اليوم عمل ولا حساب وغدا حساب ولا عمل

Today there are deeds and no judgment, and tomorrow there will be judgment and no deeds.

The Imam is drawing our attention to the opportunity we have been given in this world to prepare for the afterlife. Once we die, we don’t have it anymore and the only thing we have in the afterlife is judgment of our deeds, whether good or bad.