Hebrews 12:14-17 urges believers to pursue peace and holiness, as these are essential for seeing the Lord. It warns against allowing bitterness to take root, which can cause trouble and defile many. The passage also references the story of Esau, who traded his birthright for a single meal, illustrating the danger of making impulsive, short-sighted decisions. Esau later regretted his choice but found no opportunity to reverse it, highlighting the seriousness of spiritual neglect and the consequences of missing out on God's grace.