Guiding of the Holy Spirit

Throughout Acts 20-21, we see that Paul is continually warned by the Holy Spirit, through others, not to continue to Jerusalem. Paul seems to dismiss these cautions, but why? If the Holy Spirit was truely using other people to speak to Paul, wouldn't that be the work of the Lord. In other words, believing in the trinity, wouldn't the Holy Spirit's warning be from God. If that's the case then why would Paul continue his journey towards Jerusalem. Or if it was God's will for Paul to suffer in Jerusalem, then why would the Holy Spirit try to convince him not to go. The best I can understand is that maybe the Holy Spirit was giving these revelations to others so that Paul might be remembered as someone willing to follow Christ no matter the cost. Maybe the Holy Spirit wanted him to go, but wanted others to see his sacrafice in going.