Inspirational quotes on life, some of them can be used for memoirals, funerals and letters of condolences:

It is foolish and wrong to mourn the men who died.
Rather we should thank God that such men lived.
--- George S. Patton, Jr.

We cannot banish dangers, but we can banish fears.
We must not demean life by standing in awe of death.
--- David Sarnoff

The most wasted of all days is one without laughter
--- E. E. Cummings

A man who dares to waste one hour of time
has not discovered the value of life.
--- Charles Darwin

There are only two ways to live your life.
One is as though nothing is a miracle.
The other is as though everything is a miracle.
--- Albert Einstein

Two roads diverged in a wood,
and I took the one less traveled by, 
And that has made all the difference.
--- Robert Frost

The Road Not Taken

Security is mostly a superstition.
It does not exist in nature,
nor do the children of men
as a whole experience it.
Avoiding danger is no safer
in the long run than outright exposure.
Life is either a daring adventure,
or nothing.
--- Helen Keller

Achieving life is not the equivalent of avoiding death.
--- Ayn Rand. Author

I went to the woods because
I wished to live deliberately,
to front only the essential facts of life,
and see if I could not learn
what it had to teach,
and not, when I came to die,
discover that I had not lived.
--- Henry David Thoreau Walden, 1854

Do what you can,
with what you have,
where you are
--- Teddy Roosevelt

Everyone must row with the oars he has
--- English Proverb

God will not look you over for medals,
degrees or diplomas, but for scars.
--- Elbert Hubbard

Until you know that life is interesting
-- and find it so
-- you haven't found your soul.
--- Geoffrey Fisher

It is not length of life, but depth of life.
--- Ralph Waldo Emerson (1803-1882)

Be not afraid of life.
Believe that life is worth living
and your belief will help create the fact.
--- William Jones

To touch the soul of another human being
is to walk on holy ground.
--- Stephen R. Covey

It's the circle of life,
and it moves us all,
through despair and hope,
through faith and love,
'till we find our place,
on the path unwinding.
--- Elton John, The Lion King

The greater the obstacle,
the more the glory in overcoming it.
--- Moliere

The world is your mirror
and your mind is a magnet.
What you perceive is in this world is largely
a reflection of your own attitudes and beliefs.
Life will give you what you attract
with your thoughts.
think and act and talk negatively
and your world will be negative.
Think and act and talk with enthusiasm
and you will attract positive results.
--- Michael LeBeuf

To reach a great height
a person needs to have great depth.
--- Anonymous

People are like stained-glass windows.
They sparkle and shine when the sun is out,
but when the darkness sets in,
their true beauty is revealed
only if there light is from within.
--- Elizabeth Kubler Ross

Those who wish to sing always find a song.
--- Swedish proverb  

And life is what we make it,
always has been,
always will be.
--- Grandma Moses

Every person, all the events of your life
are there because you have drawn them there.
What you choose to do with them is up to you.
--- Richard Bach

It is one of the most beautiful compensations
of this life that no man can sincerely try to
help another without helping himself.
--- Ralph Waldo Emerson

The best and most beautiful things in the world
cannot be seen, not touched.
but are felt in the heart.
--- Helen Keller

If you want happiness for an hour take a nap.
If you want happiness for a day -- go fishing.
If you want happiness for a year -- inherit a fortune.
If you want happiness for a lifetime -- help someone else.
--- Chinese Proverb

I believe that every human mind feels pleasure
in doing good to another.
--- Thomas Jefferson

If there is light in the soul,
there will be beauty in the person,
If there is beauty in the person,
there will be harmony in the house,
If there is harmony in the house,
there will be order in the nation,
If there is order in the nation,
there will be Peace in the World.
--- Chinese Proverb

Life let us cherish, while yet the taper glows,
And the fresh flow'ret pluck ere it close;
Why are we fond of toil and care?
Why choose the rankling thorn to wear?
--- J. M. Usteri 1763-1827.

That best portion of a good man's life,
--His little, nameless, unremembered acts
of kindness and of love.
--- William Wordsworth 1770-1850.

Our birth is but a sleep and a forgetting:
The soul that rises with us, our life's star,
Hath had elsewhere its setting,
And cometh from afar.
Not in entire forgetfulness,
And not in utter nakedness,
But trailing clouds of glory, do we come
From God, who is our home:
Heaven lies about us in our infancy.
--- William Wordsworth 1770-1850.

It's often said that life is strange.
But compared to what?
--- Steve Forbert

To laugh often and much;
to win the respect of intelligent people
and the affection of children;
to earn the appreciation of honest critics
and endure the betrayal of false friends;
to appreciate beauty;
to find the best in others;
to leave the world a bit better
whether by a healthy child,
a garden patch, or a redeemed social condition;
to know even one life has breathed easier
because you have lived.
This is to have succeeded.
--- Ralph Waldo Emerson