1 Corinthians 14:4-6, fostering spiritual growth and unity

In these verses, Paul addresses the spiritual practice of speaking in tongues and its purpose within the Christian community. When he states that "he that speaketh in an unknown tongue edifieth himself," he emphasizes that this form of speech primarily benefits the individual practitioner, serving as a private means of spiritual reinforcement, prayer, or communion with God. It’s akin to a solitary act that nurtures one's own spiritual life but doesn't directly contribute to the collective edification of the church.