I think there's every reason this 21st century will be much happier.

As we advance in life we learn the limits of our abilities.  

In a controversy the instant we feel anger we have already ceased striving for the truth, and have begun striving for ourselves.

A loving heart is the truest wisdom.

Life should be great rather than long.

It ain't as bad as you think. It will look better in the morning.

There is nothing like returning to a place that remains unchanged to find the ways in which you yourself have altered.

It is better to be violent, if there is violence in our hearts, than to put on the cloak of nonviolence to recover impotence.

Every art and every inquiry, and similarly every action and choice, is thought to aim at some good; and for this reason the good has rightly been declared to be that at which all things aim.

Exercise is bunk. If you are healthy, you don't need it: if you are sick you should not take it. 

Reflect upon your present blessings of which every man has many - not on your past misfortunes, of which all men have some.

I like the religion that teaches liberty, equality and fraternity.