I learnt an important lesson today. 'Your mood does not determine your actions, your actions determine your mood.' It has helped me through the day and I think it could potentially help me through the rest of my life. It's psychologically proven but I want it to take it to the next level. Because if that is true then your life can be exactly what you want it to be and doing what you like will make you happy, it's not dependent on another else. I also learned about Einstein's Special Theory of Relativity which explains how to interpret motion between different inertial reference frames - frames where the acceleration is zero. The theory states that the speed of light is constant in all reference frames which means that objects in different references frames experience time differently and measure objects to different lengths to another frame. Basically this means that things are measured in relation to another reference frame and it is different from...