In my thought, when I meditate about the sin and myself, I realize there are questions that come up in my mind. Why GOD allowed sins? And why Catholics defined these 7 as cardinal sins? Do they really that dangerous? And I came up with the answer.
WRATH
The most destructive and the most easily known of all cardinal sins. Wrath bring the worst in human characters and makes him/her to do violence in verbal or action towards others. This sin is the most dangerous in large scope, in example in riot or in banters.
Small dose of wrath is needed for justice. Without any anger, justice cannot be done.
SLOTH
Sloth is laziness. The most passive sin in cardinal sin. But this sin has 2 paths, for ourselves and for the others. For ourselves, this is the weakness of the body. The body want only to rest and not want to work. For the others, this mean we ask the others to do our jobs. Sloth focus in short-cut method, not using full potential of yourselves, and reasoning to not do something.
Without sloth, body would not rest and they will no chance of regeneration. This will ruin the whole body metabolism and harmful the body in long run. In second case, this gives us motivation to make arrangements, teamwork, better management skill, good algorithm, better solution, better efficiency, and many technology improvements.
ENVY
Envy is usually connected with pride and greed. Envy itself means we want others possesion, usually with the wrong way and use the short cut to obtain it or destroy it if we unable to get it.
With correct usage, envy can give us focus to our goal and better improvement to our beings.
GLUTTONY