In the Name of Allah, The Most Gracious, Most Merciful
Dear noble brothers, bygones belong to the past, and our hopes belong to the unseen future which we have no control of, so what do you possess? Well, the hour you live is everything you possess, and it has been said, "The worldly life is but one hour, so let it be an hour of obedience."
Spend the time you have in seeking Islamic knowledge, in offering good deeds, in performing the acts of worship, in advising others, in enjoining Ma'roof (what is right), in preventing Munkar (what is wrong), in reading a useful book or in spreading goodness among people, because the worldly life is but one hour.
Five types of days:
It has been said that the days you live are of five kinds: a lost day which belongs to the past, and it is pointless to talk about it, a present day you live now that is considered the most serious day at all, an inevitable day on which you will die,
a promised day which is the Day of Resurrection, and an everlasting day which man spends either in eternal bliss in Paradise or in an ongoing torment in Hell-Fire.
Praise be to Allah, the Lord (The One and Only) of the Worlds, and blessings and peace be upon our Master Muhammad, the Truthful and the Faithful.