"Guarantee"

From John 8:12 I am the light of the world." Whoever follows me will never walk in darkness, but will have the light of life." Making the commitment to live as Jesus commands is everyones struggle. The guarantee is this verse! There is no other Guarantee in life. The problem is truly allowing God through Jesus to guide and control our lives. What could we possibly lose by following this command? I pray to God to answer this prayer.