One must be true to the faith even if it means losing one’s life; the Church has always taught and prescribed this principle. There is never a valid reason for renouncing Christ. This is something the martyrs clearly understood and acted upon.
Justin Martyr wrote in his Dialogue with Trypho: “They cut our hands off, they nail us to crosses, they throw us to wild beasts, imprison us and burn us, and we submit to every kind of torture; yet everyone knows that we do not betray our faith. Rather, the worse our sufferings the more there are who embrace faith and devotion in the name of Jesus.”