There has to be evil...

There has to be evil so that good can prove its purity above it.

It is a man's own mind...

It is a man's own mind, not his enemy or foe, that lures him to evil ways.

When one has the feeling of dislike for evil...

When one has the feeling of dislike for evil, when one feels tranquil, one finds pleasure in listening to good teachings; when one has these feelings and appreciates them, one is free of fear.

An insincere and evil friend is more to be feared...

An insincere and evil friend is more to be feared than a wild beast; a wild beast may wound your body, but an evil friend will wound your mind.