Abraham and Abimelech were not friends. They were not acquaintances. They did not see each other often or hang out on the weekends. In fact, Abimelech was the king of a foreign nation, who was deceived in his first encounter with Abraham (which showed that Abraham was not perfect). However, there was something about Abraham that was obvious to Abimelech.
“God is with you in all that you do!” (Gen. 21:22). Abimelech made a similar statement to Isaac, “We have certainly seen that the Lord is with you!” (Gen. 26:28). How did he know?
There was something about Abraham, something about Isaac, something about the way they lived, something about the course of their lives that stood out, was distinct and was obvious that they were different and were being blessed by their God. The question for us is, “Do we have that same ‘something’ in our lives that is making it obvious to the Abimelechs in our lives that we serve the Almighty God and are being blessed by Him every day?” Think about it.