Arba was the greatest among the Anakim or giants, Jos 14:15. His three sons were equally formidable, Jos 15:14. But Caleb subdued them through an omnipotent faith, 1Jn 5:4-5. Jesus can give us victory over the Anakim of our hearts; the only condition is faith.
Twice in Scripture we are told this story of Achsah. See Jdg 1:13, etc. With fatherly generosity Caleb gave her the upper and the nether springs. When men are right with God they can distribute living water to others. Let us never rest content with the lower, but aspire to the highest, Joh 3:12, remembering that it is our Father’s good pleasure to give.
Alas for the record of Jos 15:63! Centuries passed till David came and subdued the city, 2Sa 5:6. But there would have been no waiting had Judah gone up in the power of God. See Psa 60:5, etc.