What are false refuges in relation to salvation?

False refuges include the temptation to rely on past actions or future promises instead of the immediacy of faith in Christ. The sermon highlights two specific examples: looking to 'yesterday' for assurance, which may involve clinging to past experiences of faith or salvation, and 'tomorrow,' which entails depending on intentions or plans to come. Both imply a works-based salvation, which falls short of the grace of God. The writer encourages believers to live in the present, encouraging each other today to trust in Christ. True faith must be engaged in a present relationship with Jesus, just as today's manna represents the need for daily reliance on Christ.