According to Hilary, faith is a recognition of the divinity of Jesus and a proper understanding of the Trinity. As understood by him, faith is important above all in the fight against heresy and in the daily life of the people. He teaches that faith is not opposed to knowledge, although they differ from each other. Rational faith and spiritual education repel the attacks of heretics and pagans. Faith is a remedy against impious doctrine and it heals the inner darkness of the believer. For faith to lead to union with God it must be tempted, because temptation leads to self-discovery. Faith can be strengthened only in danger and suffering, and acts of faith lead the believer to salvation.