Here's a 3-sentence synopsis at a 7th grade reading level:

Spurgeon preaches a Christmas sermon encouraging young Christians who are going home for the holidays to tell their families and friends about what God has done for their souls, arguing that true Christianity doesn't separate people from their families but actually strengthens those relationships. He urges them to share their personal story of conversion humbly and earnestly—not as preachers giving sermons, but as grateful sinners telling how God showed them mercy and changed their lives—because this testimony could lead their family members to Christ too. The sermon emphasizes that whether someone's family is godly or ungodly, they should go home and share their story one person at a time with love, remembering that one day in heaven they'll tell this same story of God's amazing grace to their heavenly friends forever.

A sermon delivered by Charles Spurgeon on December 21, 1856.