Revelation 21:4
Sadness and tears are part of life, and we all experience them at one time or another. Disappointment, regret, and sorrow are all part of living in a fallen world that has turned it's back on God.
However, there is coming a day when all that will change. The world as we know will pass away, and God will rebirth creation with a new heaven and new earth.
At that time, God will establish His eternal kingdom here on earth. We will be His people, and He will be our God. You will have a new eternal body that will never die or become frail.