Death is not the original purpose for mankind. God's purpose was to have mankind to live under perfect conditions in Paradise. The pain and suffering we experience with the lost of our love one does not originate with God's plan in the beginning.
However, due to mankind disobedience we now sin, grow old and die. These conditions will also change - as there will be a resurrection of all those in the memorial tomb (John 5:28, 29). We all have the opportunity to gain knowledge and to draw close to God. We also have the opportunity to learn the truth about death which can protects one from religious lies. The truth is that the resurrection is a reality; as was the case with the resurrection of Lazarus - who was resurrected and gave "No Account" of a terrifying ordeal while he laid asleep in death.
So death is a reality for us today - however, soon this will all come to pass (Revelation 21:3,4). What we need to do is to take advantage of the tiime we have now to secure our place in God's heart for the future.