Marcus Aurelius Antoninus Augustus, author of "Meditations" (26 April 121 – 17 March 180) which is a culmination of his notes and philosophies going through many of the same questions and realizations that we search for today, though he was a Roman Emperor as portrayed in Gladiator. The happiness of your life depends upon the quality of your thoughts: therefore, guard accordingly, and take care that you entertain no notions unsuitable to virtue and reasonable nature.
Within the Vedas and the Upanishads, original and second of the ancient Hindu writings was stated;
Beyond the spirit in man is the spirit of the universe, and beyond that is the spirit supreme. Nothing is beyond the spirit supreme. He is the end of the path, he is in everything, and he is beyond definition. When a mortal knows him, then he will find peace and be free from all sorrows.
The ancient I Ching Scriptures which seem to predate all other writings, enlist the help of an unnamed source to answer any of your life's questions or for solutions or guidance.