People knowing God through my behavior

I Samuel 29:1-11
The Philistine gathered to flight against Israel, David and his men were marching at the rear with Achish. The commanders of the Philistine asked Achish the loyalty of Hebrews.
Achish said to David " As surely as the Load lives, you have been reliable, and I would be pleased to have you serve with me in the army. From the day you come to me until now, I have found no fault in you, but the rulers don't approve of you."
David asked," But what have I done, what have you found against your servant from the day I came to you until now? Why can't I go and flight against the enemies of my load the king?"
Achish answered,"I know that you have been as pleasing in my eyes as an angel of God; nevertheless, the Philistine commanders have said, 'He must not go up with us into battle.'
David and his men got up early in the morning to go back to the land of the philistines.
Why?
The Philistines muster at Aphek, They have not yet moved north to Shunem.
David didn't flight against Israel, the Load helps David away from this embarrass situation.
It is common sense that the Philistines are not believe David may flight with them.
Loyalty is uneasy to identify, it need evidence to approve it. From the behavior to understand it, native people is common sense, but it still depends on each other.
David won the respect and trust from Achish, even Achish said to David in name of the Load.
How?
No matter what we do we should have good behavior to witness the honor of the Load, like David have been pleased with Achish.
People knowing God through me, the behavior of christian.