In Matthew 5:27-28, Jesus intensifies the understanding of adultery, moving beyond the external act to the inward motion of lust in the heart. This passage highlights the significance of internal purity, teaching that wrongful desires already breach God’s commandments even if the physical act does not occur. Regarding masturbation, this verse cautions believers to scrutinize the lustful intentions driving their actions, emphasizing the moral weight of internal thoughts aligned against God’s call to holiness.

Paul addresses sexual immorality broadly in this passage, emphasizing that the body is meant to honor God as a temple of the Holy Spirit, highlighting the sacredness of sexual union within marriage. While masturbation is not directly mentioned, the call to “flee fornication” and to glorify God with the body invites believers to consider how any sexual activity, including masturbation, aligns with honoring God and the covenantal nature of sexual union described here.

Paul contrasts the “works of the flesh” with the “fruit of the Spirit” to highlight behaviors arising from human sinful desires versus those produced under the Spirit’s influence. While the passage does not directly address masturbation, it speaks to self-control (temperance) as a fruit of the Spirit—a virtue important in managing all desires. For Paul’s audience in Galatia, walking by the Spirit meant rejecting sinful impulses and pursuing holiness, which involves exercising discipline over bodily passions.