Discretion is not the better part of biography.Lytton Strachey
The history of the Victorian Age will never be written we know too much about it. For ignorance is the first requisite of the historian - ignorance, which simplifies and clarifies, which selects and omits, with a placid perfection unattainable by the highest art.Lytton Strachey
The man who knows when not to act is wise. To my mind, bravery is forethought.Euripides
Concentration is my motto - first honesty, then industry, then concentration.Andrew Carnegie
I think that the Communist Party as a political organization is of no danger to the United States. It has no following and has been disregarded by the American people for many, many years.Robert F. Kennedy, A Thousand Days, by Arthur M. Schlesinger Jr. 
If you're afraid to let someone else see your weakness, take heart Nobody's perfect. Besides, your attempts to hide your flaws don't work as well as you think they do.Julie Morgenstern
The most important trip you may take in life is meeting people halfway.
In crises the most daring course is often safest.