Faith is trust, hope, and belief in the goodness, trustworthiness or reliability of a person, concept, or entity. It can also refer to beliefs that are not based on proof (e.g. faith that a child will grow up to be a good person). Faith in religion is a belief in a transcendent reality, a religious teacher, a set of teachings or a Supreme Being. Generally speaking, it is offered as a means by which the truth of the proposition, "things will turn out well in the end," can be enjoyed in the present and secured in the future. This faith appeals to transcendent reality, or that reality which is beyond the range of normal physical experience (e.g. the future).
Transcendent reality, in this view, constitutes a realm which is off limits to material measurement and scientific inquiry such as falsifiability and reproducibility. Philosophical reflection on the nature of theistic and religious faith has produced different accounts or models of its nature. The concept of faith is a broad one: at its most general ‘faith’ means much the same as ‘trust’. Informal usage of the word faith can be quite broad, and the word is often used as a mere substitute for "hope", trust or belief. The English word is thought to date from 1200–50, from the Latin "Armani", also from fidem or fidēs, meaning trust, derived from the verb fīdere, to trust.
Some critics of faith have argued that faith is opposed to reason. In contrast, some advocates of faith argue that the proper domain of faith concerns questions which cannot be settled by evidence. This is exemplified by attitudes about the future, which (by definition) has not yet occurred. Logical reasoning may proceed from any set of assumptions, positive or negative. In this view, faith is simply a positive assumption.