Jamieson, Fausset, and Brown present faith here as giving present substance to what is hoped for and real conviction about what is not yet seen. Hebrews 11 then unfolds that definition by showing how the saints lived, obeyed, and endured on the strength of what God had promised (Jamieson, Fausset & Brown Commentary).
Hebrews 11:1
Now faith is confidence in what we hope for and assurance about what we do not see.
