Tomorrow is the most important thing in life.  Comes into us at midnight very clean.  It’s perfect when it arrives and it puts itself in our hands.  It hopes we’ve learned something from yesterday.
— John Wayne

Our plans miscarry because they have no aim.  When a man does not know what harbor he is making for, no wind is the right wind.
— Seneca (4 B.C. — A.D. 65)

Take away the cause, and the effect ceases.
— Miguel de Cervantes

If you know the point of balance, you can settle the details.  If you can settle the details, you can stop running around.  Your mind will become calm.  If you mind becomes calm, you can think in front of a tiger.  If you can think in front of a tiger, you will surely succeed.
— Mencius

Finish each day and be done with it.  You have done what you could.  Some blunders and absurdities no doubt crept in; forget them as soon as you can.  Tomorrow is a new day; begin it well and serenely and with too high a spirit to be encumbered with your old nonsense.
— Ralph Waldo Emerson

Opportunity is missed by most people because it is dressed in overalls and looks like work.
— Thomas Edison