How Can I Be Sure of You

The other day a friend of mine said
He said, the sun's not really yellow
He said, the sun is really redI said, my friend, what do you mean?
You read that in some magazine?
Next thing you'll say the earth's not greenHow can I be sure of you?
When you know the world's always changing
Rearranging, always changing, changingI said, my friend, how do you do
And what you're saying isn't true
The next thing you'll say the earth is blueHe said, my friend, you're in a dream
And things are never what they seem
Oh, things are never what they seemHow can I be sure anymore?
When the world's always changing
Rearranging, changing