God calls believers to impact the world with His truth through three key actions: walking in the truth, working for the truth, and witnessing to the truth. Walking in the truth requires both a praying faith and a personal faith where objective truth becomes personally embraced. Working for the truth involves supporting fellow believers in a synergistic effort that multiplies our impact. Witnessing to the truth means actively sharing the gospel locally and globally. When Christians unite in these three areas, the gospel spreads powerfully, as illustrated by the remarkable growth of a church in Colombia that began with just one housekeeper hearing the message of salvation by grace.