Death

Life is meaningless if there is not a process of death. Death is one of the symphony of God's thoughts. But no one knows what will happen after death. It's a big question mark marked on human mind and is unsolved
But it will be resolved if we are able to foresee our future and go back to the past. But in reality there is no element as life and death both are just fears created by our ambiguous mind. Actually life means our perception and death means the end of our perception.