When a broken appliance is demonstrated for the repairman, it will work perfectly. Everyone has a scheme for getting rich that will not work. When in doubt, mumble. When in trouble, delegate. It is morally wrong to allow suckers to keep their money.
Nature always sides with the hidden flaw.
Celibacy is not hereditary. Beauty is only skin deep, ugly goes to the bone. In case of doubt, make it sound convincing. If everything seems to be going well, you obviously don't know what the heck is going on. Never play leapfrog with a unicorn.