3:12 evil heart. Note that an “evil heart of unbelief” (Hebrews 3:12) is also an erring heart (Hebrews 3:10) and a hardened heart (Hebrews 3:8).

3:13 one another. There are many “one another” passages in Scripture, and it is important to practice them daily. Not only should we “exhort one another daily,” but also “edify one another” (I Thessalonians 5:11), “pray one for another” (James 5:16), “comfort one another” (I Thessalonians 4:18), “be kind one to another” (Ephesians 4:32), and especially “love one another” (John 13:34). There are many other such admonitions in Scripture.