There are poisons that look like crystal spring water. A glass of such poison, placed next to a glass of clear water will fool the eye; the two look exactly alike. But one has death in it, the other life. You have to discover by other means than drinking the true nature of the two liquids.
In the same way there are many things in life that are deadly, but have the seeming appearance of goodness. This is why, when you must make a choice about some pleasure, amusement, or action, you must not come to your decision on the basis of appearances.