Matthew 27:45-46 (NKJV): Now from the sixth hour until the ninth hour there was darkness over all the land. And about the ninth hour Jesus cried out with a loud voice, saying, "Eli, Eli, lama sabachthani?" that is "My God, My God, why have you forsaken Me?"
A sin is a sin, and a sin has to be punished! This is God's unchanging 'standard'. Yet, knowing that you cannot save yourself from eternal damnation and punishment (for all have sinned and fallen short of God's glory - see Romans 3:23, and the wages of sin is death - see Romans 6:23), and because of His great love for you, He was willing to send His only begotten Son (Jesus) to die for you, so that His Son would take upon Himself your sin and punishment instead (see John 3:16, Isaiah 53).
God the Father and God the Son are inseparable. But yet, because of God's great love for you, they had to separate (Matthew 27:45-46). Again, sin is sin, and sin cannot 'mix' with the holiness of God. But Jesus took upon Himself all your sins (2 Corinthians 5:21), and therefore He had to be separated (forsaken) from God the Father. At that time, darkness also hovered over all the land (Matthew 27:45). Indeed, what happened in the spiritual realm (between God the Father and God the Son) was also reflected in the physical realm then and there. In other words, the 'sun' lost its 'light' (i.e. glory)!
If the 'sun' represents God the Father, then 'light' represents God the Son. Imagine you wake up in the morning one day, and the 'sun' doesn't shine! The truth is the 'sun' without its 'light' is no 'sun' at all! The same also goes with 'heat'. Imagine you wake up in the morning again, and the 'sun' fails to release heat! The 'sun' without its 'heat' is also no 'sun' at all!
So, again, if the 'sun' represents God the Father, and 'light' represents God the Son, then surely 'heat' therefore represents God the Holy Spirit. These three are One, and inseparable. As a matter of fact, without any of these three, the 'sun' is no 'sun' at all! This is indeed a clear reflection of God the Father, God the Son, and God the Holy Spirit! As a matter of fact, what is in the spiritual realm is reflected in the physical realm.
Now God forbid that we Christians worship the physical sun (for the physical sun is only a creation of God), but yet God has also given us a clear 'sign' in the form of the physical sun, so that we'll understand who our God is, 'Three in One', but One God. Amen!
