Why is it important to start investing earlier in ones life?

If someone starts to invest at an earlier stage in life, there is more time to acheive a greater return on investment. Not only are you able to have more time to acheive a greater return on investment, but, there is more time to research what you'd like to invest in and what your 5, 10, 15 and so on year plan is for investing. Most people have a reason they invest and motivation to stick to their goal.