Viewing this quote anew, I'm suddenly struck by what it doesn't say. It doesn't promise that planting trees for others will make you happy, or fulfilled, or remembered. There's no guaranteed reward mentioned at all - and perhaps that's part of the deeper wisdom. The understanding comes precisely from being at peace with not receiving anything in return.
This connects to how we think about legacy in an interesting way. Many people want to leave a mark on the world, to be remembered, to have buildings named after them or their names inscribed somewhere. But the tree planter in this metaphor isn't seeking recognition - they're content to contribute anonymously to a future they'll never see.
The humility of this position feels particularly relevant today, when social media and personal branding often push us toward performing good deeds for recognition. The quote suggests that the deepest understanding of life might come precisely when we let go of the need for our contributions to be recognized or attributed to us at all. The tree doesn't know who planted it, and that's part of the beauty.