Samuel Logan Brengle emphasizes the radical nature of holiness, asserting that true holiness is inseparable from 'Christ in you.' He argues that making holiness popular is impossible, as the real Christ is often despised and rejected by the world. Brengle warns against the dangers of hypocrisy and worldly friendship, urging believers to follow the humble and sacrificial example of Jesus. He highlights the call to self-denial and the radical commitment required to truly follow Christ, which stands in stark contrast to worldly values. Ultimately, he encourages believers to seek holiness for God's glory rather than for human approval.