Explain lines 21-22 Virtue itself turns vice being misapplied And vice sometime by action dignified?

Answer 1

It means that virtue itself has the ability to turn vice if being misapplied. It means that even if your are trying to do something that is good, it can turn out to be bad; for example, let's say that a child likes candy bananas, but now the child has eaten too many bananas and so has a stomachache. Although the banana is a healthy food , it is misapplied and so there are negative impacts on the child.

Likewise, if you commit something bad for good reasons, it will still be wrong, but it will be dignified and justified; for example, if a teenage boy's father is in the hospital and needs one million dollars to pay for an operation or the father dies, then the son will have to make a quick and decisive decision. However, if the son robs a bank to get the money ,although what he is doing is wrong, and he gets caught he will probably be thrown in jail. Because what he did was virtue itself, his father would understand and appreciate the act committed.

In essence, irrespective of the fact the son did something bad (vice), his action was dignified due to the good nature of the act.

Grammar and Syntax have been corrected.

In summary, Virtue (good) turns to vice (evil) if it's misused, and vice sometimes becomes virtue through the righteous activity.