The Son gives life, yet the Sun gives light

I opened the window in my room as to let the breeze of the wind to come in, but the Sun came in and gave light.
And i opened my heart and yet the Son came in and give me life.
It is with the Sun that i see the light, and yet the Son is the light of this world. 
Without the sun i see nothing, and without the Son in my life i am nothing. i need the Sun to survive, yet i need the Son to be alive for eternity. 
The Sun i see and have for 12 hours a day yet the Son said "I am the same today, tomorrow and for eternity". who is the Son? i am talking about Jesus Christ our Lord and Savior.