How appropriate that Kathy and I had the start of our marriage on D-Day 35 years ago. I've joked with Kathy before that we've had 33 good years of marriage.  

The first two years felt like the start of our own D-Day battle as Kathy and I both pursued our own selfish interests. Eventually, Kathy and I put Christ at the center of our marriage, which helped us experience smoother sailing. 

When a new team member joins your organization, they may bring their own selfish interests, which will impact your culture. 

Philippians 2:3 teaches, "Do nothing out of selfish ambition or vain conceit. Rather, in humility value others above yourselves." 

Help your new employees succeed by sharing the importance of humbly serving others rather than their selfish interests, and model humility yourself.