Before you kill something make sure you have something better to replace it with...
The biologists have essentially been pushed aside. Al Gore's just an opportunist. The person who is really responsible for this overestimate of global warming is Jim Hansen. He consistently exaggerates all the dangers.
To be led by a fool is to be led by the opportunists who control the fool.
I would rather be an opportunist and float than go to the bottom with my principles around my neck.
There`s one way of looking at the Trump phenomenon that he`s essentially a Doofus or he is an opportunist.
Criminals are opportunists. If you've got a booming market, they're going to get away with more fraud.
It is better to be prepared for an opportunity and not have one than to have an opportunity and not be prepared.
Exceptional performers are masterful opportunists, keenly alert to opportunity!
I think everyone is an opportunist if they have an opportunity.