The future is the indefinite time period after the present
Present is a time that is neither past nor future.Present may also refer to:- Time and timing :* Present tense, the grammatical tense of a verb* Before Present, radiocarbon dates relative to AD 1950* Presenting, a medical term* Presenteeism...

. Its arrival is considered inevitable
In the Dungeons & Dragons role-playing game, inevitables are extraplanar magical constructs.-Publication history:The marut first appeared in the first edition in the original Manual of the Planes ....

 due to the existence of time
Time is a part of the measuring system used to sequence events, to compare the durations of events and the intervals between them, and to quantify rates of change such as the motions of objects....

 and the laws of physics. Due to the nature of the reality
In philosophy, reality is the state of things as they actually exist, rather than as they may appear or might be imagined. In a wider definition, reality includes everything that is and has been, whether or not it is observable or comprehensible...

 and the unavoidability of the future, everything that currently exists and will exist
Exist may refer to:* eXist, an open source database management system built on XML* Existence* Energetic X-ray Survey Telescope, a proposed hard X-ray imaging all-sky deep survey mission...

 is temporary
Temporary may refer to:Computing* Temporary variable* Temporary file* Temporary folder* Temporary filesystemOther uses* Temporary work, a common working arrangement...

 and will come to an end. The future and the concept of eternity
While in the popular mind, eternity often simply means existence for a limitless amount of time, many have used it to refer to a timeless existence altogether outside time. By contrast, infinite temporal existence is then called sempiternity. Something eternal exists outside time; by contrast,...

 have been major subjects of philosophy
Philosophy is the study of general and fundamental problems, such as those connected with existence, knowledge, values, reason, mind, and language. Philosophy is distinguished from other ways of addressing such problems by its critical, generally systematic approach and its reliance on rational...

, religion
Religion is a collection of cultural systems, belief systems, and worldviews that establishes symbols that relate humanity to spirituality and, sometimes, to moral values. Many religions have narratives, symbols, traditions and sacred histories that are intended to give meaning to life or to...

, and science
Science is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe...

 and defining them non-controversially has consistently eluded the greatest of minds.

"Never let the future disturb you. You will meet it, if you have to, with the same weapons of reason which today arm you against the present." --Marcus Aurelius Antoninus Meditations

"Take hold of the future or the future will take hold of you - be futurewise." -- Patrick Dixon, Futurist and author Futurewise 1998/2005

"For I dipt into the future, far as human eye could see, saw the vision of the world, and all the wonder that would be." --Alfred Tennyson|Alfred Lord Tennyson

"I've seen the future, brother; it is murder." --Leonard Cohen, The Future

"To-morrow, and to-morrow, and to-morrow, creeps in this petty pace from day to day, to the last syllable of recorded time; and all our yesterdays have lighted fools the way to dusty death. Out, out, brief candle! Life's but a walking shadow, a poor player that struts and frets his hour upon the stage, and then is heard no more; it is a tale told by an idiot, full of sound and fury, signifying nothing." -- Macbeth" by William Shakespeare

"No eyes can read the future, because it is a book not yet written!" --Mehmet ildan, Quotations

"Future is an unknown country which requires tough visas for anyone to enter. Not all of us will get the chance to visit it." --Mehmet ildan, Quotations

"People ask me to predict the future, when all I want to do is prevent it. Better yet, build it. Predicting the future is much too easy, anyway. You look at the people around you, the street you stand on, the visible air you breathe, and predict more of the same. To hell with more. I want better." ~ Ray Bradbury Beyond 1984: The People Machines