“Faith: Believing in Something, when Common Sense Tells You Not To.”
Someone added to the above quote with… “strong belief in God or in the doctrines of a religion, based on spiritual apprehension rather than proof.”
Faith is confidence or trust in a particular system of religious belief, in which faith may equate to confidence based on some perceived degree of warrant. Wikipedia
Faith is trust, assurance and confidence in God. Living faith is shown by service and obedience to God. God will increase our faith if we fervently ask and draw close to Him.