Definition and Concept:
The concept of "Reflection of Inner Purity" in the Bible refers to the manifestation of a person's inner holiness and righteousness through their outward actions, words, and demeanor. It is the idea that true purity of heart, as cultivated through a relationship with God, will naturally be reflected in one's life. This purity is not merely an external adherence to religious rituals or moral codes but is deeply rooted in the transformation of the heart by the Holy Spirit.

Biblical Foundation:
The Bible emphasizes the importance of inner purity as the foundation for outward righteousness. In the Sermon on the Mount, Jesus teaches, "Blessed are the pure in heart, for they will see God" (Matthew 5:8). This beatitude highlights the significance of inner purity as a prerequisite for experiencing the presence of God. The heart, in biblical terms, is the center of one's being, encompassing thoughts, emotions, and will. Therefore, purity of heart is essential for a genuine relationship with God.

Old Testament Insights:
The Old Testament frequently addresses the theme of inner purity. In Psalm 51:10, David prays, "Create in me a clean heart, O God, and renew a right spirit within me" . This plea for a clean heart underscores the necessity of divine intervention in achieving true purity. The prophets also speak to this theme, as seen in Ezekiel 36:26, where God promises, "I will give you a new heart and put a new spirit within you" . This transformation is a work of God, leading to a life that reflects His holiness.

New Testament Teachings:
The New Testament further develops the idea of inner purity. Jesus criticizes the Pharisees for their focus on external rituals while neglecting the purity of the heart, saying, "Woe to you, scribes and Pharisees, hypocrites! You clean the outside of the cup and dish, but inside they are full of greed and self-indulgence" (Matthew 23:25). This admonition highlights the futility of external righteousness without inner transformation.

The Apostle Paul also addresses this theme, urging believers to "put off your former way of life, your old self, which is being corrupted by its deceitful desires; to be renewed in the spirit of your minds; and to put on the new self, created to be like God in true righteousness and holiness" (Ephesians 4:22-24). This passage emphasizes the renewal of the mind and spirit as essential to reflecting inner purity.

Practical Implications:
The reflection of inner purity is evident in the believer's conduct, speech, and relationships. James 3:17 describes the wisdom from above as "first of all pure, then peace-loving, gentle, accommodating, full of mercy and good fruit, impartial, and sincere" . These qualities are the outworking of a heart transformed by God's grace.

Believers are called to live lives that reflect their inner purity, as seen in 1 Peter 1:15-16: "But just as He who called you is holy, so be holy in all you do, for it is written: 'Be holy, because I am holy'" . This call to holiness is a call to reflect God's character in every aspect of life.

Conclusion:
The reflection of inner purity is a central theme in Scripture, emphasizing the transformation of the heart as the foundation for a life that honors God. Through the work of the Holy Spirit, believers are empowered to live in a way that reflects their inner purity, demonstrating the reality of their faith to the world.