Don't Be Afraid: The Miraculous Call That Comes to the Unworthy

In This Sermon

• The Encounter with Holiness: The sermon opens with Isaiah 6 — the prophet’s vision of the Lord high and lifted up, the seraphim crying “Holy, holy, holy,” and the temple filling with smoke. Isaiah’s immediate response is “Woe to me! I am ruined! For I am a man of unclean lips.” When we truly see God, we see ourselves clearly for the first time.

• Grace Before the Call: Before Isaiah can confess, repent, or volunteer, a seraph touches his lips with a coal from the altar — “your guilt is taken away and your sin atoned for.” The pattern is declared early: grace precedes calling. God does not wait for Isaiah to qualify himself before He speaks.

• The Miraculous Catch: In Luke 5, Jesus borrows Peter’s boat to teach the crowds, then commands the tired fisherman to put out into deep water for a catch. After a fruitless night on the water, the nets fill to the point of breaking. The sign is not just about fish — it announces the presence of the Holy in the ordinary boat of an ordinary working man.

• “Go Away From Me, Lord”: Peter’s response mirrors Isaiah’s — he falls at Jesus’s knees and says “Go away from me, Lord; I am a sinful man!” He does not ask for more fish or for the miracle to continue; he asks Jesus to leave. The sermon explores this moment of holy fear: genuine encounter with God always exposes our poverty before His abundance.

• “From Now On You Will Fish for People”: Jesus’s response to Peter’s confession is not a lecture or a list of requirements. It is simply a calling — “Don’t be afraid; from now on you will fish for people.” Vocation is not abandoned but reoriented: the same hands, the same nets, a wholly new purpose and direction.

• The Least of the Apostles: The sermon closes with 1 Corinthians 15:9-10, where Paul calls himself “the least of the apostles” who does not deserve to be called one — then immediately adds “but by the grace of God I am what I am.” The pattern runs from Isaiah to Peter to Paul and to us: we are not called because we are qualified. God qualifies those He calls.

Theological Citations:

1. Luke 5:1-11: The primary Gospel text — the miraculous catch of fish, Peter’s confession of unworthiness, and Jesus’s call to fish for people; the New Testament center of the sermon’s calling theme.

2. Isaiah 6:1-8: “Woe to me! I am ruined!… Here am I. Send me!” — The Old Testament parallel text; Isaiah’s vision, atonement, and commissioning establish the pattern of grace-before-calling that runs through the entire sermon.

3. 1 Corinthians 15:1-11: “Last of all he appeared to me also… But by the grace of God I am what I am.” — Paul’s testimony as the third instance of the pattern: the unworthy, encountered by the risen Christ, called and sustained by grace alone.

4. Psalm 138:3: “When I called, you answered me; you greatly emboldened me.” — The Psalm reading voices the human experience of being met and strengthened by God in response to a cry, echoing both Isaiah’s and Peter’s encounters.

5. Jeremiah 1:4-10: “I do not know how to speak; I am too young… I have put my words in your mouth.” — A further Old Testament calling text that reinforces the sermon’s theme: God’s callings consistently come to those who feel disqualified, and His word equips what His grace commissions.

6. Romans 8:30: “Those he predestined, he also called; those he called, he also justified; those he justified, he also glorified.” — Paul’s summary of the divine order: calling is part of the chain of grace, not a reward for prior readiness.

7. The Augsburg Confession, Article V — The Ministry of the Word: “To obtain such faith God instituted the office of the ministry, that is, provided the Gospel and the sacraments.” — The confessional grounding for the sermon’s vocation theme: God sends people through the Word, as He sent Isaiah, Peter, and Paul.

8. Luther’s Small Catechism — The Third Article of the Creed: “I believe that by my own reason or strength I cannot believe in Jesus Christ my Lord or come to him, but the Holy Spirit has called me by the Gospel.” — The Lutheran articulation of the grace-before-calling pattern the sermon traces through Scripture: the call is always God’s initiative, never ours.