Meditation allows you to take time and reflect on things in your life and your surroundings, opening up a plethora of possibilities and new perspective. everyone react to the things our consciousness is aware of but how we react is governed by who we are. many people are governed solely by there religious laws and some are governed by there society, some are governed by past traumatic events and some are govern by there primal urges. as a matter of fact we all govern ourselves with a combination of all these factors that is what makes up our personality, our character.
Meditation exercises the mind to choose who we want to be and how we want to live. taking ownership of your thoughts is the first step of taking ownership of your life; it inspires your will which is the driving force of our power by the way. that is how it changes your life.
Yes, through meditation you can gain understanding from nature and the cosmic universe spiritual forces, so they are more gracious to aid you in your magical workings when you invoke them. but meditation is not gathering to energy from the universe that is energy manipulation, centering, and grounding to a degree. however meditation does help build focus so when you manipulate energy energy you have better control of what you are doing but you did not ask how meditation reflects to magick you asked how can meditation change your life..