She is a tree of life to them that lay hold upon her: and happy is every one that retains her (Παροιμίες 3:18)
When you find the wisdom of God, and keep it in your heart, and walk in this wisdom, then this wisdom shall be a tree of life for you. It is the tree of life for you, when you lay hold upon her and retain her.
When you take the wisdom and understanding of God and retain her, then you will experience the peace and the joy of God in your life.
