ISB ~ Hebrews 11 v1

things not seen:Such as the heavenly Jerusalem (11:10, 16; 12:22), where Jesus ministers in the heavenly sanctuary (4:14; 8:1-2; 12:2).

• Faith is distinct from all other acts of the intellect. It is defined as assurance, which distinguishes it from opinion, suspicion, and doubt; it adheres to things not seen, which distinguishes it from science, whose object is something apparent; and it is directed toward things hoped for, by which the virtue of faith is distinguished from popular notions of faith, which have no reference to the beatitude we hope to attain (St. Thomas Aquinas, Summa Theologiae II-II, 4, 1).