"We are to admit no more causes of natural things than such as are both true and sufficient to explain their appearances"

This quote by Isaac Newton is a reminder to be conscious of the causes of natural phenomena. He is suggesting that we must only accept explanations that are both true and enough to explain the looks of natural things. To put it simply, we need to decline any explanations that are not backed up by evidence or that are not sufficient to explain the phenomenon. This quote is a suggestion to be critical of the descriptions we accept and to be sure that they are based upon realities and proof. It is also a tip to be unbiased and to think about all possible descriptions prior to picking one. Newton's quote is a tip to be mindful of the reasons for natural phenomena and to be sure that we are accepting explanations that are both true and adequate.