Final answer:
The phrase 'what was made through Him (the true Light)' in theological and artistic contexts refers to creation through Jesus Christ, expressed in religious art as the divine nature of Christ symbolized by light, leading the faithful to spiritual contemplation.
Step-by-step explanation:
The phrase 'what was made through Him (the true Light)' refers to the theological and artistic concept that through Jesus Christ, who is seen as the divine light in Christianity, all creation came into existence. This idea is often expressed in religious art and scripture, such as the Christian notion of 'logos' found in the Gospel of John which states that all things were made through Christ. In the context of art, this concept is exemplified by the imagery of light in religious mosaics, paintings, and architecture, suggesting the divine nature of Christ and acting as a symbol for spiritual enlightenment and the presence of God. Particularly, the mosaic of Christ Pantokrator and the associated artwork reflect the divine light and are intended to lead the faithful from material to spiritual contemplation.