I am not sure if you would consider Hermes Trimesgistus a philosopher, but I would like to have Dinner with him. He resided in Old Egypt and was believed to have been Abraham’s teacher.

He taught that to be truly free is to come to the truth that to be truly free is to the realization that that the soul or spirit live on forever after our body dies.  Some believed that his teachings were the foundation for some of the world’s religions for example the Tribune God and so as above, so as below which is part of the Lord’s Prayer. Thy will be done on Earth as it is Heaven.