Morality: Well Done, Wrongly Done

This, more or less, is what I tend to believe about morality:

Take, for example, that which we are now doing, drinking, singing and talking—these actions are not in themselves either good or evil, but they turn out in this or that way according to the mode of performing them; and when well done they are good, and when wrongly done they are evil; and in like manner not every love, but only that which has a noble purpose, is noble and worthy of praise.
-From Plato’s Symposium

What sayest thou?