@Chukwudi_Kingsley_Ononiwu Great question I think it helps to look at the surrounding context of Jesus’ statement. The Samaritan woman has just questioned Jesus by saying the Samaritans and Jews worship on different mountains. Jesus replies by saying that salvation is from the Jews—not the Samaritans—but that one day neither mountain will be important because people will worship God in spirit and truth.
So Jesus’ point was that one day soon people would worship God not at a mountain, but in spirit and truth. Jesus is the truth and the Spirit testifies about Jesus. So Jesus’ point, in my understanding, is that one day people will be filled with the Holy Spirit and worship Him. As Christians we are God’s temple; His Spirit dwells in us and we worship the true God.
In that sense, I think the answer to your question is that spirit and truth must indeed go together because the Spirit will always point us to the truth, who is Jesus.
John 4:19-24 - “Sir,” the woman said, “I can see that you are a prophet. 20 Our ancestors worshiped on this mountain, but you Jews claim that the place where we must worship is in Jerusalem.” “Woman,” Jesus replied, “believe me, a time is coming when you will worship the Father neither on this mountain nor in Jerusalem. 22 You Samaritans worship what you do not know; we worship what we do know, for salvation is from the Jews. 23 Yet a time is coming and has now come when the true worshipers will worship the Father in the Spirit and in truth, for they are the kind of worshipers the Father seeks. 24 God is spirit, and his worshipers must worship in the Spirit and in truth.”