…This is the way, walk ye in it… _ Isaiah 30:21

Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by Me. – John 14:6

Definite instruction is given. This may not suit the Broad School, but it is exactly what the anxious seeker needs. This definite instruction may also be said to be a special correction. When the voice behind says, “This is the way,” it does as good as say that the opposite path is not the way; for there is only one way to heaven, and there never will be two; and when men hear a voice saying, “This is the way,” it does in effect remind them that the opposite is not the way. If ye are going the reverse of the right way, turn ye from it, and ye shall live. How much we ought to bless God that the gospel comes in as a corrective, kills the false and introduces us to the true. May falsehood be slain within us, and truth reign there for ever. May we leave all other roads, since the Lord has said of one road only, “This is the way.”

if we have already believed it to be the way we are strengthened in that conviction. Hearing the mysterious word declaring again and again, “This is the way,” men grow to believe the truth of God’s word, and out of that by-and-by there is begotten a living faith in a living Saviour. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/1672.cfm