You live recklessly when you do not take God's law seriously or respond to the gospel properly. Reckless living can look like laziness and apathy. When you simply aren't motivated and tell yourself that God has forgiven you in Jesus, so you're not going to fight temptation and sin - that is reckless living, and it's far more dangerous than you realize.
Joe Thorn, Note to Self: The Discipline of Preaching to Yourself
apathy, discipline, faith, life, reckless, sanctification