"Across the Universe" Beatles

Three images that I found in this song were: 

• "Words are flying out like endless rain in a paper cup"
• "Thoughts meander like a restless wind inside a letter box"
• "Limitless, undying love... shines around me like a million suns"

In context, the third image mentioned could be a symbol. The "million suns" mentioned could be a symbol for a love that he can't let go or forget. 

The cross is a symbol for Christianity, this is a symbol I've known my whole life.