While many believed in Jesus and his message, many others, including the religious leaders, opposed him. Some openly mocked him when he warned them about their sin of unbelief. It's impossible to be indifferent to Jesus' word and his judgments. We are either for him or against him. There is no middle ground or neutral parties. When Jesus spoke about going away he was speaking about his return to his Father and to his glory. His opponents could not follow him because by their continuous disobedience to the word of God and their refusal to accept him, they had shut themselves off from God. Jesus warned them that if they continued to refuse him they would die in their sins. Jesus' words echoed the prophetic warning given to Ezekiel (see Ezekiel 3:18 and 18:18) where God warns his people to heed his word before the time is too late. God gives us time to turn to him and to receive his grace, but that time is right now.