The idea behind dividend investing is that you will eventually make it big by having the dividends accumulating on shares purchased by the dividend reinvestment. For example, if you put $10,000 into Apple stock in 2007, today 10 years later you would have $108,703.12 invested in the company. The annualized return would be 26.98%. For a nice calculator to see what a past investment in a certain company would provide today, visit this site.
Do the math, if you get into solid companies with future growth and dividend potential, you can realize a massive gain on your shares. Apple may not be the best example since the company did not start paying a dividend until relatively recently. But the fact is that if you input more solid dividend aristocrats, you can see the power of passive income and dividend reinvestment.