So of cheerfulness, or a good temper, the more it is spent, the more of it remains.

So of cheerfulness, or a good temper, the more it is spent, the more of it remains.

The only limit to our realization of tomorrow will be our doubts of today.

The only limit to our realization of tomorrow will be our doubts of today.

Be an optimist -- at least until they start moving animals in pairs to Cape Canaveral.

Be an optimist -- at least until they start moving animals in pairs to Cape Canaveral.

Few cases of eyestrain have been developed by looking on the bright side of things.

Few cases of eyestrain have been developed by looking on the bright side of things.

I became an optimist when I discovered that I wasn't going to win any more games by being anything else.

I became an optimist when I discovered that I wasn't going to win any more games by being anything else.

Having a positive mental attitude is asking how something can be done rather than saying it can't be done.

Having a positive mental attitude is asking how something can be done rather than saying it can't be done.

What seems to us as bitter trials are often blessings in disguise

What seems to us as bitter trials are often blessings in disguise

There is no sadder sight than a young pessimist, except an old optimist.

There is no sadder sight than a young pessimist, except an old optimist.

A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty.

A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty.