Only His presence, only His voice, only His truth. That’s where the healing is.
Jesus tells the disciples all about the Holy Spirit, assured them of His peace, and then says not to fear. It implies that what the Lord gives covers us so completely, that nothing should cause us too much concern. As if the immeasurable power of the Holy Spirit isn’t enough, God gives us the Holy Spirit in love–the love of a perfect heavenly Father providing for His children.