The word “faith” is translated from the Greek piʹstis, primarily...

The word “faith” is translated from the Greek piʹstis, primarily conveying the thought of confidence, trust, firm persuasion. Depending on the context, the Greek word may also be understood to mean “faithfulness” or “fidelity.”—1Thess 3:7; Titus 2:10.
The Scriptures tell us: “Faith is the assured expectation of things hoped for, the evident demonstration of realities though not beheld.” (Heb 11:1) “Assured expectation” translates the Greek word hy·poʹsta·sis. This term is common in ancient papyrus business documents. It conveys the idea of something that underlies visible conditions and guarantees a future possession.
The Greek word eʹleg·khos, rendered “evident demonstration,” conveys the idea of bringing forth evidence that demonstrates something, particularly something contrary to what appears to be the case. Thereby this evidence makes clear what has not been discerned before and so refutes what has only appeared to be the case. “The evident demonstration,” or evidence for conviction, is so positive or powerful that faith is said to be it.
Faith is based on concrete evidence. The visible creative works testify to the existence of an invisible Creator. (Romans 1:20) The actual occurrences taking place during the ministry and earthly life of Jesus Christ identify him as the Son of God.
(Matthew 27:54) But when the army officer and those with him keeping watch over Jesus saw the earthquake and the things happening, they grew very much afraid and said: “Certainly this was God’s Son.”

All of us have faith. Sadly though, it is most often misplaced.
(Proverbs 3:5-7) Trust in Jehovah with all your heart, And do not rely on your own understanding.  In all your ways take notice of him, And he will make your paths straight. Do not become wise in your own eyes. Fear Jehovah and turn away from bad.