to be confident: to hold a settled inner courage that stays steady under pressure and shows up in what a person dares to say and do
This is courage as a state a person is already in, not a shout of encouragement to someone else. It never appears in the New Testament as a command. Paul and the writer of Hebrews use it to describe people who are steady, and the steadiness is always aimed somewhere: at what lies ahead, at other people, or at opponents.
The three directions are worth seeing together, because one Greek word covers all of them:
- facing death and the unseen, it is the calm of knowing that leaving the body means being at home with the Lord (2 Corinthians 5:6, 5:8)
- facing other people, it is trust: Paul says he can count on the Corinthians in everything (2 Corinthians 7:16)
- facing opposition, it is nerve: Paul warns that he is prepared to be firm with the people who are writing him off (2 Corinthians 10:1, 10:2)
What holds those together is that the courage rests on something outside the person. In Hebrews 13:6 believers can speak up because "the Lord is my helper," so there is nothing a human being can do to them worth fearing. This is not the self-made calm of a philosopher who has talked himself out of being afraid; it is confidence with a reason for it, and the reason is God.
The word sits close to several others without being any of them. The same verb in an older spelling, θαρσέω, is what Jesus says out loud to frightened people in the Gospels: "take heart!" A different word, παρρησιάζομαι, is public plain speaking in front of strangers and hostile crowds, while this word only supplies the nerve behind the speaking. Another, τολμάω, is the daring act itself, and Paul uses both in one breath in 2 Corinthians 10:2. The related noun (θάρσος) names the courage itself, which is what Paul picks up when believers come out to meet him on the road to Rome.