The Frogs And The Well ~ Aesop

Two frogs lived together in a marsh. But one hot summer the marsh dried up, and they left it to look for another place to live in, for frogs like damp places if they can get them. By and by they came to a deep well, and one of them looked down into it, and said to the other, "This looks a nice cool place. Let us jump in and settle here." But the other, who had a wiser head on his shoulders, replied, " Not so fast, my friend. Supposing this well dried up like the marsh, how should we get out again."

Think twice before you act.