John 16:13- Howbeit when he, the SPIRIT OF TRUTH is come, he will guide you into all truth; for he shall not speak of himself; but whatsoever he shall hear, that shall he speak; and he will shew you things to come.
The Spirit of Truth is the Holy Spirit. the Holy Spirit came once Jesus went up on the cross and died and rose again on the third day. The Holy Spirit is also called the comforter, helper, and teacher.
Have you heard/listened to the voice of The Holy Spirit?
Genesis 1:28 