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, he said "The sun is really red" I said "my friend what do you mean? You read that in some magazine Next thing you'll say, the earth's not green" How can I be sure of you anymore In a world that's always changing Rearranging, always changing, changing? I said, my friend "How do you do? And what you're saying isn't true Next thing you'll say the earth is blue" He said, "My friend you're in a dream And things are never what they seem No, things are never what they seem" How can I be sure of you anymore In a world that's always changing Rearranging, always changing, changing Changing, changing Changing, changing Changing, changing Changing, changing Changing?