"The only certainty is that ... there are as many 'real worlds' as there are people!"
—The Learner-Centered Curriculum

"The only certainty today is that one must be self-conscious."
—John Elderfield, De Kooning: A Retrospective (2011)

"The only certainty is it is almost impossible to please both audiences at the same time.
—Deacon Bill Rich, Joy: The Journey Home (2012)

"The only certainty, the only reality that can be trusted, is stillness."
—Daniel P. Watkins, Anna Letitia Barbauld and Eighteenth-Century Visionary Poetics (2012)

"The only certainty is this: If you do nothing, you'll achieve nothing."
—Vickie L. Milazzo, Wicked Success Is Inside Every Woman (2011)

"Our Higher Self is at all times there for us—a constant and eternal companion and the only certainty that we can count on."
—Brigitte Arora, Transformation of the Human-Animal (2012)

"The only certainty is that exceptions occur."
—Rand Wilcox, Modern Statistics for the Social and Behavioral Sciences (2011)

"The only certainty in our life is that when time moves on it is forever lost."
—Paramahamsa Nithyananda, Bhagavad Gita: Demystified (2011)

"The only certainty is that you cannot run a business without cash."
—Project Management Accounting: Budgeting, Tracking, and Reporting Costs and Profitability

"The only certainty, the only promise, [is] that night [is] coming soon."
—Larry D. Sweazy, The Badger's Revenge (2011)

"The only certainty I have is that perseverance in the habit of writing is usually in direct relation to its absurdity, while we usually do brilliant things quite spontaneously."
—Enrique Vila-Matas, Never Any End to Paris

"The only certainty is that you will have unfinished business, and it will weigh on your mind, and you won't even know why."
—Jim T. Lindsey, A Traveler's Guide for Lost Souls: The Flaw in the Fabric (2011)

"The only certainty is that 'someone', 'somewhere', who has committed a certain offense, deserves to die."
—Is the Death Penalty Dying?: European and American Perspectives (2011)

"It is strange that in this world in which everything is sooner or later lost, where losing is the only certainty, one gets attached to even the smallest things and wants to be able to say goodbye even to a pair of pants, rather than have it simply disappear."
—Allen Shawn, Twin: A Memoir (2010)

"The only certainty is that there will be a rational solution."
—Mark A. Bedau & Carol E. Cleland, The Nature of Life

"The only certainty we enjoy now is that we are alive."
—Jaime Batista, Epilogue: Time Machine Chronicles (2010)

"Fire is the only certainty."
—Laurell K. Hamilton, Bullet (2010)

"Our only certainty here is that the field is open and game goes on!"
—P. Tarazona, "Density Functional Theories of Hard Particle Systems" (2008)

 "Our only certainty is to act with the body."
—Wittgenstein

"There is no guarantee that we will succeed at whatever we attempt to do, but we should still fully engage our energies in living in the present because this split-second moment in time is our only certainty."
—Alexandra Stoddard, Things Good Mothers Know (2009)