To think positive you must read positive books, articles, quotes and mix with positive people!

I expect to pass through life but once.
If therefore, there be any kindness I can show,
or any good thing I can do to any fellow being,
let me do it now, and not defer or neglect it,
as I shall not pass this way again.

William Penn (1644 -1718)

Success seems to be largely
a matter of hanging on after others
have let go.
William Feather