The perplexity of the Eleven is seen in Thomas’ statement–we do not know where You are going. Peter asks a similar question in John 13:36 (KJV)
(36) Simon Peter said unto him, Lord, whither goest thou? Jesus answered him, Whither I go, thou canst not follow me now; but thou shalt follow me afterwards.
This topic would remain a puzzle until His death and resurrection and until the advent of the Spirit. They had all the information they needed, but it would take the Holy Spirit to reveal this to them.
Jesus’ words, “I am the Way and the Truth and the Life are the sixth of Jesus’ seven “I am” statements in this gospel. (John 6:48; 8:12; 10:9, 11; 11:25; 14:6; 15:1). Jesus is the “Way” because He is the “Truth” and the “Life.” As the Father is Truth and Life, Jesus is the embodiment of God so people can come to the Father–John 1:4; 14, 18; 11:25. No one can come to the Father except through Jesus. Salvation is not attainable through many ways. He is the only way. http://ref.ly/Ac4.12 and http://ref.ly/1Ti2.5. Jesus is the only access to the Father because He came from the Father. John 1:1-2, 51 and John 3:13.