External nature is only internal nature writ large

यथा चित्तं तथा वाचो यथा वाचस्तथा क्रिया ।
चित्ते वाचि क्रियायां च साधूनामेकरूपता ॥

As is the mind, so is the speech; as is the speech so is the action.

Of the good people there is uniformity in mind, speech and action.

The statement signifies that according to the internal nature i.e. our thoughts, our behaviour, our external nature i.e how we speak and interact with others turns out to be. We always speak what we think and our behaviour reflect your mind. If we don’t learn to control our thoughts, we will never learn how to control our behaviour. As changing behaviour is a matter of giving people analysis to influence their thoughts then helping them to see a truth. 

Swami Vivekananda Ji highlighted the statement the external nature is only internal nature writ large, he affirmed that basic instinct of a person are reflected in the outward personality. It's the nature of gypsum when added to cement with water and on solidifying acts as an adhesive that binds the bricks and stones in much concrete and solid manner. Gypsum (CaSo4), inner bonds and nature gives such adhesive traits and thus are shown outwardly also. Entire, chemistry is self explanatory, how the basic nature of compounds are responsible for greater innovations and discoveries like Air bags inflate when a sensor detects a front end crash. The sensor sends an electric signal to start a chemical reaction that inflates the air bag with harmless nitrogen gas. All this happens faster than the blink of an eye. Similarly, it validates with the nature of person too, basic instinct of person are the foundation of external personality that is being witnessed by the soceity all around. 

Impact of Circumstances in building nature of person - Person is well known if he/she acts according to the demand of situation. Legendary Usha Mehta, the first to initiate the Congress radio to unite the entire nation for the freedom struggle against Britishers. Being the daughter of a judge who was serving in the British judiciary, justifying her daughter responsibility as well as nation's daughter and when situation called for choosing one, she bravely had opted for serving nation, because of her immense passion for patriotism. Circumstances or environment are fruitful in making an identity of person but if person is competent enough to resist against the abruption, the inner qualities actually makes the external personality. Situational factors can shape personality traits in a variety of ways, such as through modeling and reinforcement, socialization, and exposure to different experiences and situations. Similarly, studies have also examined the impact of genetic factors on personality development by comparing the personality traits of individuals who share the same environment but have different genetic makeup (such as fraternal twins). These studies also suggest that genetic factors can contribute to personality development, even in individuals who share the same environment.

Deep connection between the external world and our internal experiences - It implies that the patterns and principles governing the external world are simply a magnified reflection of the same fundamental principles that govern our thoughts, emotions, and behaviors. A woman are considered as a great leaders, reason being they are more emotionally connected and firm in her beliefs. Women being more expressive, rarely masks the traits and generally with loyalty and honesty does her work with the bestest approach. The quote highlighting the interdependence and similarity between the two. Meditation, yoga, exercise bridges the distance between inner and outer personalites of a person. Knowing yourself to the fullest is the critical condition of enlightening the passion of our own personality and adorning ourselves to the purpose that we are actually meant for.  The means and the results, the good and the bad, are within all of us who are aware and care.

Conclusion - inner beauty is more beautiful than facial beauty. Hence, more concentration should be on developing the consciousness and inner traits. Whatever we eat, we reflects on the face.. whatever we thinks, we mirrors the same thoughts and attributes. Basic characters and instincts are like our childhood, that we have learned at that time still remains with us lifetime. 

One's actions and their consequences are not solely determined by external factors but also by personal awareness and concern. It highlights the notion that acknowledging and caring about the consequences of our actions become the determining factors in whether we choose to do good or indulge in bad.This quote suggests that each individual possesses both the potential for good and the potential for bad.