In Roman mythology, Janus serves as the god of beginnings and transitions, symbolizing new starts and the passage of time. Often depicted with two faces, one looking to the past and the other to the future, he embodies the dual nature of change. Janus was invoked at the beginning of important events, such as marriages and wars, marking the significance of starting anew. His presence emphasizes the importance of acknowledging both what has been and what is yet to come, making him a vital figure in Roman culture regarding transitions and duality in life.