Now faith is the substance of things hoped for, the evidence of things not seen.

[Ἔστιν δὲ πίστις ἐλπιζομένων ὑπόστασις, πραγμάτων ἔλεγχος οὐ βλεπομένων.]

The Bible (The New Testament) (AD 1st - 2nd C) Christian sacred scripture
Book 19. Letter to the Hebrews 11: 1 (Heb 11:1) [KJV (1611)]
    (Source)

(Source (Greek)). Alternate translations:

Only faith can guarantee the blessings that we hope for, or prove the existence of the realities that at present remain unseen.
[JB (1966)]

Only faith can guarantee the blessings that we hope for, or prove the existence of realities that are unseen.
[NJB (1985)]

To have faith is to be sure of the things we hope for, to be certain of the things we cannot see.
[GNT (1992 ed.)]

Faith is the reality of what we hope for, the proof of what we don’t see.
[CEB (2011)]

Now faith is the assurance of things hoped for, the conviction of things not seen.
[NRSV (2021 ed.)]