"Something MAY not remain tomorrow."
Have we seen TOMORROW? It might be true that I have 60-70 more years to live on an average, BUT, Can I be sure of the VERY NEXT BREATH I might take NOW? When a child is born, the countdown towards his death, THAT VERY MOMENT, starts!
When we are never sure of a single tomorrow, why do we worry ourselves so much thinking about THAT FUTURE, which only ALLAH knows, may or may never become a present. If that is how it is, then why can't we thank ALLAH for what is ours today? And when it is only by HIS grace that we HAVE that dearestestestestestestestest........ possession today, HE shall never be THAT cruel to take it away JUST LIKE THAT!
Therefore, it is totally unwise to worry about what will remain TOMORROW. If ALLAH wills to bless u with another morning, HE shall certainly make that morning brighter than today, keeping the dearestestestestestestest..... belonging yours forever n always, Insha Allah :)
Keep the trust in ALLAH, gather courage through prayers and live the blessed moments of today, thanking their giver, to the fullest!