I understand that gospel was referring to Jesus having the father within him, it was about Jesus being the WAY, the TRUTH and the LIFE. Jesus told Philip and Thomas that there is plenty of room for us in his kingdom. Jesus is with us always and he is the father. Jesus also said that if we have faith in him we are also having faith in the father, Philip and Thomas didn't really have faith in Jesus because they didn’t know who the father was.
But if they just believed then they would have known. Have faith in Jesus and you’ll be one with the father.