Love "is not boastful or vainglorious, does not display itself haughtily. It is not conceited (arrogant and inflated with pride)" (1 Cor. 13:4-5). If you lack humility~if you think you are more important than other people~your life will be full of conflict and strife. Humility is a prerequisite if you want to live in peace and harmony with others. Pride goes before destruction (Prov. 16:18), but if you humble yourself, God Himself will exalt you. Many relationships have been destroyed by a spirit of strife just because neither party displayed humility and a willingness to wait for God to do the exalting.
H/T: Conflict Free Living by Joyce Meyer