Abimelech was asking Isaac to make an oath in covenant terms with him. Abimelech could see the power of the LORD and wanted to ensure that Isaac will do no harm towards him. Abimelech reminds Isaac that they (Philistines) have not harmed Isaac in any way and has done good towards him. And, sent Isaac away in peace.
For in Him we shall have no need, want, or fear as there is none greater than He in this material world. His protection...
... so that, with the eyes of your heart enlightened, you may know what is the hope to which he has called you, what...
"Do not forsake wisdom, and she will protect you; love her, and she will watch over you. Wisdom is supreme; therefore get wisdom. Though...
