I am saved by the grace of God and am heaven-bound no matter what I do or do not do here after the day of my salvation! So what if my sinful actions lead others astray or if my lack of obedience precludes me from training others to follow Jesus: at least there will be peace and security in my days! Because Hezekiah cared so little about future generations, his son became the most evil king Judah had ever known. If I care more about my own salvation than I do for the spiritual wellbeing of those I love, then what will become of those who follow me?
Jesus tells us a parable about people who hide their talents because they are afraid of what God will do if they lose it. God takes that talent away and gives it to those willing to share their talents with others. We should be secure in our salvation but not so secure that we are afraid to lose it.

