"It takes a very deep-rooted opinion to survive unexpressed"

This quote by Jean Rostand speaks to the power of viewpoint and the strength of conviction. It recommends that viewpoints that are deeply held and not revealed are still powerful and can endure. This indicates that even if a viewpoint is not shown others, it can still have an enduring impact. It also recommends that opinions that are not revealed can be more effective than those that are. This could be because unexpressed viewpoints are not subject to the analysis of others, and therefore can remain unaltered and pure. It could also be because unexpressed opinions are not subject to the influence of others, and for that reason can remain true to the individual's beliefs. Eventually, this quote recommends that viewpoints that are deeply held and not revealed can still have a lasting impact, and can be more effective than those that are revealed.