istis: faith, faithfulness
Original Word: πίστις, εως, ἡ
Part of Speech: Noun, Feminine
Transliteration: pistis
Phonetic Spelling: (pis'-tis)
Definition: faith, faithfulness
Usage: faith, belief, trust, confidence; fidelity, faithfulness.
HELPS Word-studies
4102 pístis (from 3982/peithô, "persuade, be persuaded") – properly, persuasion (be persuaded, come to trust); faith.
Faith (4102/pistis) is always a gift from God, and never something that can be produced by people. In short, 4102/pistis ("faith") for the believer is "God's divine persuasion" – and therefore distinct from human belief (confidence), yet involving it. The Lord continuously births faith in the yielded believer so they can know what He prefers, i.e. the persuasion of His will (1 Jn 5:4).
[4102 (pistis) in secular antiquity referred to a guarantee (warranty). In Scripture, faith is God's warranty, certifying that the revelation He inbirthed will come to pass (His way).
Faith (4102/pistis) is also used collectively – of all the times God has revealed (given the persuasion of) His will, which includes the full revelation of Scripture (Jude 3). Indeed, God the Lord guarantees that all of this revelation will come to pass! Compare Mt 5:18 with 2 Tim 3:16.]
More on what faith is . . . and isn't
In Scripture, faith and belief are not exactly the same. Faith always comes from God and involves His revelation therefore faith is beyond belief!
Faith is God's work; faith is never the work of people. We cannot produce faith ourselves, nor can we "drum it up at will." Rather, faith comes as Christ speaks His rhçma-word within (see Ro 10:17, Gk text).
In all of Scripture, only the term faith is ever used in the following way: Ro 14:23: Whatever is not of faith (4102/pistis) is sin." Heb 11:6: "And without faith (4102/pistis) it is impossible to
please Him, for he who comes to God must believe that He is and that He is a rewarder of those who seek Him" (NASU).
Reflection: Nothing quite like this two-fold witness appears elsewhere in the Bible. These sweeping statements sober the heart and inspire the soul!
The Lord offers to inbirth faith in each scene of life – so that each matters equally in eternity . . . no matter how insignificant they seem (Lk 16:10 with Lk 17:6 and 2 Pet 1:2).
https://biblehub.com/greek/4102.htm