Friend, this is the truth that wants no evidence or proofs.
We are all souls that house various types of spirits. We live in our bodies made up of a complex cosmic data processor and various electronic devices that sends certain electronic impulses to the processor. We call these signals feelings and emotion through which we experience pains and pleasures.
One day, we will pull off this garment we call body and realize that we are nothing but souls transcending to be merged with God (some call the universal spirit).
From where we came from, there was no suffering. We need to come here to experience all these things. It is not your suffering or pleasure God wants to assess but how you have managed your life during the experience of the two situations.