Strong Tower
The inspiration for this illustration springs from Proverbs 18:10 which states "The name of Yahweh is a strong tower; the righteous run to it and are safe."
This is a great reminder for repentant sinners who have called upon the name of the Lord(Romans 10:13), that there is safety and security for their souls, and that this salvation, from sin and eternal judgment is sure and secure in Christ, who paid the ultimate payment for sin in full.
This payment was accomplished by Jesus Christ's death on a cross where he undertook the punishment mankind deserved guaranteeing deliverance from future wrath and condemnation. Though this payment guarantees the safety of the repentant sinners soul it doesn't mean that he is exempt of suffering and the various trials that are part of the Christian life, but there is assurance that the soul, the inner state of man where all his faculties dwell(emotions, mind and will), wether in life or death remains untouched and safe in the hands of grace.
As Christ has lived the perfect life, fulfilling all righteousness in order to satisfy the just requirements of the Law and dying the death of sinners to be a substitute to suffer in their place he also satisfies the wrath of God the Father, and by faith in Christ, sinners are credited Christ's righteousness.
Therefore the righteous that run into this tower of the name of Yahweh are those who through repentance and faith in Christ are credited His own righteousness. He justifies them through faith and brings them into His tower of eternal safety.