We are mortal. In this present earthly body we shall die. We feel the finality of death. Death will separate us from this world. We cannot come back.
All theories of reincarnation are pipe-dreams, false, delusions.
It is not true. That is not what God's Word says. After we die we stand before God in the judgment, the God of all souls to whom we must give account. Death marks the period to our life, the sentence of our life. What our life expressed has been written.