Volunteering has had immense benefits - some I never would have predicted. I am
painting now, for example, because I'd been volunteering and the opportunity
arose. Because of giving my time, I discovered the miracles of infant monkeys.
I highly recommend it - following your passion and being a contribution in
whatever way makes sense for you. But so many other people have said it
more eloquently than I could. Here are a few quotes below:

I don't know what your destiny will be, but the one thing I know;
the only ones among you who will be really happy will have
sought and found how to serve.
Albert Schweitzer

Never doubt that a small group of thoughtful, committed citizens can
change the world; indeed, it's the only thing that ever has.
Margaret Mead

Everyone can be great because anyone can serve. You don't have to have a college
degree to serve. You don't even have to make your subject and your verb agree to
serve... You only need a heart full of grace. A soul generated by love...

Dr. Martin Luther King, Jr.

A volunteer is a person who can see what others cannot see; who can feel
what most do not feel. Often, such gifted persons do not think of themselves as
volunteers, but as citizens - citizens in the fullest sense; partners in civilization.
George H. W. Bush

Throughout my life, I've seen the difference that volunteering efforts can make
in people's lives. I know the personal value of service as a local volunteer.
Jimmy Carter

We make a living by what we do, but we make a life by what we give.
Winston Churchill

Volunteering can be an exciting, growing, enjoyable experience. It is truly
gratifying to serve a cause, practice one's ideals, work with people, solve
problems, see benefits, and know one had a hand in them.
Harriet Naylor

When you cease to make a contribution, you begin to die.
Eleanor Roosevelt

The miracle is this - the more we share, the more we have.
Leonard Nimoy

We ourselves feel that what we are doing is just a drop in the ocean, but
the ocean would be less because of that missing drop.
We can do no great things, only small things with great love.

Mother Teresa

Service to others is the payment you make for your space here on earth.
Mohammed Ali

One is not born into the world to do everything but to do something.
Henry David Thoreau

We can do anything we want, if we stick to it long enough.
Helen Keller

The best way to predict the future is to invent it.
Immanuel Kant