In South American the natives hunt a bight colored variety of small frogs. To cook but not to eat. They gather the sweat that comes from the skin of these frogs to place on the tip of their spears because it is very poisonous. Now what's amazing about these little frogs is that the bird kingdom that normally love little frogs for dinner will avoid them at all cost. Not even the lowly chicken will eat one of these, easy to spot because of their bright color, frogs.
Sin looks good but is very deadly.
I sometimes think that we get the horse before the cart. You cannot prepare the heart for worship if the unless you put the sin away. Their heart was pricked. That lead to Repentance. Once one has repented, then the Heart can be prepared for real worship.