I narrated an Aesop Fable that you can find in the following link The Bull & The Calf.
That is a very short fable talking about the easiness and hastiness in which youth tends to speak and act, without taking into consideration the age and experience of those to whom they address to.
Thus the calf, naively, tries to give a lesson to a full grown bull, without taking under consideration his age and size and finally, without thinking.
Many of Aesop's Fables deal with the hastiness of people in speaking. The fables emphasize the importance of thinking before one speaks. There is a suitable Greek saying that says "Πριν μιλήσεις, βούτα την γλώσσα σου στο μυαλό σου" that literally means that one should dip their tongue in their brain before they speak. Which means that people should not speak before using their mind, experiences and wisdom to test if what they are saying is useful, helpful, kind, smart.
In the fable the full grown bull answers to the calf in a way that is not disrespectful and a way that comes with age and wisdom. He says “I knew that way, before you were born.”, meaning that what the calf is saying is a very well known thing to the bull as he has been himself a calf ages ago and his present difficulty has only got to do with objective difficulties that cannot be overcome and not with ignorance on the subject at hand.