How do we know Jesus' promise to make us fishers of men is true?

In Mark 1:17, Jesus promises to make His disciples fishers of men, indicating that over time and through His empowerment, they would evangelize and bring others to faith. This promise is validated when we witness the apostles, initially simple fishermen, boldly preaching the gospel after Jesus' resurrection, particularly in Acts 2, where Peter preaches and about 3,000 souls are converted. This transformation illustrates the effectiveness of Jesus' call, demonstrating that through His grace, He equips believers for the work of ministry.