Never practice two vices at once.
Tallulah Bankhead 

Never regard study as a duty, but as the enviable opportunity to learn to know the liberating influence of beauty in the realm of the spirit for your own personal joy and to the profit of the community to which your later work belongs.
Albert Einstein (1879-1955) 

Never try to teach a pig to sing. It wastes your time and annoys the pig.
Anonymous 

Never, never, never give up.
Winston Churchill, Sir (1874-1965) 

One ought, every day at least, to hear a little song, read a good poem, see a fine picture and, if possible, speak a few reasonable words.
Johann Wolfgang von Goethe (1749-1832) 

People born to be hanged are safe in water.
Mark Twain (1835-1910)  's Mother

Problems cannot be solved at the same level of awareness that created them.
Albert Einstein (1879-1955) 

Start slow and taper off.
Walt Stack  , marathon runner

Strength lies not in defense but in attack.
Adolf Hitler 

There are a million ways to lose a work day, but not even a single way to get one back.
Tom DeMarco and Timothy Lister