People have often asked the existential question, "What is the meaning or purpose of life?"
Defining the meaning of our existence perhaps can be answered in scientific or even simplistic terms: one could say that we're sentient organisms (bipedal, carbon-based, oxygen-breathing primates) inhabiting a large biosphere and contributing to both the development and destruction of the ecosystem. If people really want to know "the meaning of life," I say check the dictionary for definitions.
But I believe the more important underlying issue is not so much the meaning of life as it is the
purpose of our existence. Once again, our purpose can generally be defined by who we are and what we do. I firmly believe that everyone has a purpose (or even several purposes) in this life, although not everyone may be aware of it. Our hopes, our dreams, our inspirations, our aspirations, our ambitions, our intentions, our desires, our motivations, our goals--and especially our PASSIONS--they define our existence as well as our purpose in this life. Why did Leonardo and other artists create such magnificent works of art? Why did William Shakespeare write amazing sonnets, tragedies, and comedies? Why did Mozart compose astounding musical pieces? Simple, because they wanted to, it was their PASSION in life, and it was their intention. The goals or intentions can be self-focused, such as the acquisition of wealth or self-development, or they can be outward or tend to focus more on others' needs.
One of the reasons for people's unhappiness is the tendency to focus on oneself--one's own problems, one's personal needs, one's finances, etc. Yes, it is important to fulfill your needs as you go through your daily life, but when you
redirect your focus outward, you will find that this is more rewarding. I've always found this to be true, speaking from personal experience. To me, giving or doing something nice for others--without even expecting anything in return--is a reward in itself. So "being nice to other people" as you exemplifed, could be considered part of your overall purpose of, say, altruism. Learning to speak a foreign language is not necessarily a "purpose" per se, but if it satisfies your overall or long-term goal of learning and self-development, then it does contribute to your purpose.
The individual cells in our bodies (neurons, red blood cells, white blood cells, sperm cells, ova) are essential to the formation of tissues, which are essential parts of our organs and systems that make us living, breathing, thinking, sensing, feeling human beings. Even the smallest particle of matter, the atom (and sub-atomic components), has a purpose in the overall scheme of things in this universe.
"You are a child of the universe
no less than the trees and the stars;
you have a right to be here."
from
Desiderata by Max Ehrmann