We can be serious about serving Christ by really caring about what He would desire that we do. If we only do things so that others will praise us or think that we are good we are fooling ourselves. We need to keep our eyes on Him rather than worrrying or thinking about how the world sees us.
We can obey the letter of the law and feel that we are in obedience, but if we do not show love or compassion for others we have fallen short. To want to do the right thing is not always easy..but oh what rewwards there are.
I think we can be serious about being obedient to God's Word by showing mercy, kindness, compassion, and grace to others. If we only follow the law but forget to love we have missed the mark.