Here are some quotes on happiness that I hope will inspire you to keep going!

To do something, however small,
to make others happy,
is the highest ambition,
the most elevating hope,
which can inspire a human being.
-John Lubbock

He who can no longer
pause to wonder
and stand in rapt awe
is as good as dead.
-Albert Einstein

Not what we have,
but what we enjoy
constitutes our abundance.
-J. Petit-Senn

Maybe these quotes were fun to read?
The_Dead_Miser