A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty. Winston Churchill
The man who is a pessimist before 48 knows too much; if he is an optimist after it he knows too little. Mark Twain
An optimist stays up until midnight to see the new year in. A pessimist stays up to make sure the old year leaves. Bill Vaughan
Scratch a pessimist and you find often a defender of privilege. William Beveridge
To an optimist every weed is a flower; to a pessimist every flower is a weed. Finnish Proverb
A pessimist is a well-informed optimist. Russian Proverb