Wherefore, be not weary in well-doing, for ye are laying the foundation of a great work. And out of small things proceedeth that which is great. (Doctrine and Covenants 64:33)
A seed is a small thing but can grow a great tree. There are so many very small things in life that can be so important: A smile. A laugh. A hug. A time when you look a person in the eye and you really listen. Times when you choose not say something negative. Calling a friend. Following a feeling that you have to do a good thing.
Big things sometimes miss the mark. We want to change the world and we try to do it all at once. But the world is changed by small and simple things. Simple kindness does a lot more than millions of dollars and thousands of companies. What happens in the home has a lot more impact on the world then what laws are passed and what programs are implemented.