When I need to ponder something, I often listen to the atmospheric soundtrack from The Talos Principle, composed by Damjan Mravunac. This music was created to accompany the solving of puzzles with a philosophical undertone, and it fits perfectly. It mentally immerses you in the ruins of ancient civilizations, where there is no concept of time. You have an eternity to think about something. The game itself is also wonderful. There is a sequel, and the recent remaster of first game.

soundtrack from The Talos Principle