Human interests
No one who puts a hand to the plow and looks back is fit for service in the kingdom of God (Luke 9: 62)
As they were walking along the road, a man said to him, “I will follow you wherever you go.” Jesus replied, “Foxes have dens and birds have nests, but the Son of Man has no place to lay his head.” He said to another man, “Follow me.” But he replied, “Lord, first let me go and bury my father.” Jesus said to him, “Let the dead bury their own dead, but you go and proclaim the kingdom of God.” Still another said, “I will follow you, Lord; but first let me go back and say goodbye to my family.” Jesus replied, “No one who puts a hand to the plow and looks back is fit for service in the kingdom of God.” (Luke 9: 57-62)
A common element to all sins is idolatry. In particular when we place our "I", our own will, in place of God's Will, deciding often to follow our own comforts and instincts. Thus, Jesus does not accept among His disciples those who are accustomed to putting human interests before God's Will. We must always try and put God first so that we can love Him with all our hearts.