Achar is a Buddhist concept that is all about understanding and being aware of the reality of all things. It's like a reminder that everything in life is constantly changing and that no situation is permanent. Achar is about recognizing and accepting that everything, including our thoughts and feelings, is always in flux. It teaches us to be mindful of the present, and to accept what is happening without judgement or expectation. This can bring a sense of peace and calm to our lives.