A rival mocked Athos monks as men with souls in their navels
In the 1330s a scholar named Barlaam met monks on Mount Athos who prayed in stillness, seeking a vision of divine light. He derided them as navel-gazers and heretics. Their defender, Gregory Palamas, fought back through years of treatises and six church councils, and his victory still shapes Eastern Orthodox thought about how humans can know God.
Palamas was born in Constantinople around 1296, son of a courtier to Emperor Andronikos II. When his father died young, the emperor himself helped raise and educate the boy and hoped he would enter government. Instead, at about 21, Gregory left for Mount Athos in 1316, where he eventually taught the silent prayer of the heart known as hesychasm. His mother and siblings also became monks and nuns, and the whole family was canonised in 2009.
The fight with Barlaam began over theology of the Holy Spirit. Barlaam argued that God is ultimately unknowable, so questions about the Spirit's origin could not be settled by demonstration; Palamas found that dangerously agnostic. Trained in Western scholastic methods, Barlaam then attacked hesychast practice directly. The monks claimed to experience the same uncreated light that shone on Christ's disciples at the Transfiguration on Mount Tabor. Barlaam called this polytheism, implying two eternal Gods, one seen and one unseen.
Palamas answered with nine treatises grouped as the Triads. His key move was to distinguish God's essence, forever beyond human grasp, from God's energies, such as grace and will, which people can genuinely encounter. Athonite leaders endorsed his teaching in the Hagioritic Tome of 1341, which became the core text of Byzantine mysticism. A synod that year condemned Barlaam, who retreated to Calabria, joined the Roman Church and became a bishop. His writings were ordered destroyed, so no complete copy of his main attack survives.
The dispute tangled with a Byzantine civil war, since many aristocrats backing John VI Kantakouzenos also supported Palamas. Another critic, Gregory Akindynos, briefly got Palamas excommunicated in 1344, but a council in 1351 vindicated him conclusively. Palamas became archbishop of Thessalonica, died in 1359, and has been venerated as an Orthodox saint since 1368.
Source: Gregory Palamas
