Jesus is God in the same way your word and actions represent who you are.
We understand who God is through Jesus. Similarly, we understand who you are through your word and actions.
So without God the Father, Jesus the man doesn't exist, but before Jesus the man existed, God the Father existed. Therefore, God the Father is greater than Jesus the man because he comes from the Father.
You are greater that your word and actions because they come from you, but you are still one being that speaks and acts a certain way. Similarly, the Father and Son are One and the Son represents who the Father is, in ways we mere humans can understand.
Does that help?