Acts 17:31 Because he hath appointed a day, in the which he will judge the world in righteousness by that man whom he hath ordained; whereof he hath given assurance unto all men, in that he hath raised him from the dead.
God has appointed the day that he would judged the whole world
The death of the Lord Jesus Christ teach us that we would die also and we would resurect also and prove to us the existence of God
Ecclesiastes 8:8 There is no man that hath power over the spirit to retain the spirit; neither hath he power in the day of death: and there is no discharge in that war; neither shall wickedness deliver those that are given to it.
There is no man that has power to retain the spirit, we are all helpless when the appointed day come
Death teach us that there is someone that is above everything which is God
Acts 17:28 For in him we live, and move, and have our being; as certain also of your own poets have said, For we are also his offspring.
He that winketh with the eye causeth sorrow: but a prating fool shall fall.
The fear of the LORD prolongeth days: but the years of the wicked shall be shortened.