The true meaning of life is to plant trees, under whose shade you do not expect to sit. - Nelson Henderson
Taking this quote at face value, it sounds like a noble thing to do. I mean trees are pretty great right. Shade, fuel for warmth, paper, and most importantly, oxygen. However, if we take a closer look we find a deeper meaning.
The true meaning of life is to do things for the greater good, even when you won't be enjoying the benefits. An example of this may be a leaving a legacy that supports a school, church or medical research, or becoming an organ donor.
Not every act for the greater good is on this scale, however, and the small things add up to make the world a better place. Let's keep planting those trees so others can enjoy the shade.