When Apostle Paul wrote to his son in the faith, Titus, he advised him to teach with encouragement, integrity, seriousness and authority.
Titus needed to instruct believers about being hospitable, kind, temperate, respectful, self-controlled, faithful, loving, patient, reverent, honest, etc. Also, Paul said to explain about when the kindness, mercy and love of God the Savior appeared to save humanity, it made all people equal.
This timeless, wise advice from Paul can be used by anyone to grow spiritually. However, the best information in this letter tells of God's salvation for us and how it made everyone equal.
Real Christianity not only teaches about our salvation but equality for all under Christ.