I don't mean to suggest that the Holy Spirit was limited in any way. Then or now :) What I disbelieve is that a promise given to eleven men commissioned with a specific responsibility is a promise given to me personally.
I agree with you that the Holy Spirit guides us. I don't agree that we're all given the same fullness of knowledge that those who walked closest with Christ were given. Still if we're both faithful to the promptings he gives, we'll end up in the same place to marvel at his glory and his mercy forever :)
May the peace of Christ guide and govern our hearts always!
They were commissioned to do what? Go out and preach the Gospel. You are to do the same. There are many many promises in the Bible going unused because we think (1) we aren't good enough (2) doesn't apply to me (3) I don't "feel" like God has chosen me to do this (4) fill in the blank with whatever. We are empowered. God wants us empowered. Blessings unused is like the servant hiding the masters money instead of increasing his wealth in his absence.
Have a blessed day.