Lloyd-Jones on the Baptism in the Holy Spirit

Christian experience and Christian doctrine belong together. Consider these
words of 'the Doctor':

Would you know the Christian truth, would you know the Christian doctrine? Would you have a firm grasp and understanding of God's great and glorious purpose? The highway to that is the baptism with the Holy Spirit. It gives greater light and knowledge and instruction than anything else, and it does so in order that we may be witnesses.

Martyn Lloyd-Jones, Joy Unspeakable, p.111