Hebrews 12:14-17 MSG

14 Work at getting along with each other and with God. Otherwise you'll never get so much as a glimpse of God.
15 Make sure no one gets left out of God's generosity. Keep a sharp eye out for weeds of bitter discontent. A thistle or two gone to seed can ruin a whole garden in no time.
16 Watch out for the Esau syndrome: trading away God's lifelong gift in order to satisfy a short-term appetite.
17 You well know how Esau later regretted that impulsive act and wanted God's blessing - but by then it was too late, tears or no tears.