Who governs the personal nature of the believer under the influence of the Holy Spirit?

The primary influence on the personal nature of the believer under the guidance of the Holy Spirit is indeed the Holy Spirit itself. This belief is grounded in the Christian doctrine that emphasizes the role of the Holy Spirit in the lives of individuals, working within them to transform their character, leading them to understand and live according to God's will.

The Holy Spirit acts as a counselor, providing wisdom, comfort, and conviction. It shapes the believer's thoughts, attitudes, and actions, helping them to develop a Christ-like nature. This transformative process is central to the believer's sanctification, which is the journey of growing in holiness and becoming more aligned with God's purposes.

While the other options — apostles, church leaders, and the individual — play significant roles in the community of faith and in guiding believers, they do not govern the personal nature of the believer in the same direct manner as the Holy Spirit. Apostles and church leaders can provide teaching and oversight, and individuals have autonomy in their spiritual journeys, but it is the Holy Spirit that directly influences and transforms the believer's inner life and character.