I fear that Patrick Trigg's understanding of Catholic doctrine and history is a bit wobbly (Mailbox, August 6). The monotheistic religions do not worship the same god.

In revealing the Holy Trinity, the mystery of three divine persons in one God, Jesus Christ allows us to identify the one, true God. Those who reject Christ as God, have made for themselves a different god.

Catholics accept that Christ, as God and man, teaches the eternal truth that leads to the resurrection of the body and eternal happiness in heaven.

When the divinity of Christ was attacked by the Arian heresy, Emperor Constantine helped to arrange the Council of Nicaea in 325AD. This confirmed what had always been taught and believed by the Church. In denying the divinity of Christ, the Arians removed the foundation of all belief in the Catholic Faith. They became physically aggressive in promoting this false teaching, thereby cutting off their families from the means of salvation. As a last resort, the civil authorities, with the support of the Catholic Church, suppressed this danger to the souls of future generations and to civil order.

As for Constantine, his victory in 312AD, fought under the sign of the Christian Cross, confirmed him as Emperor of the Roman Empire. He recognised the power of God and the truth taught by the Catholic Church. He saw the civilising effects of Christianity over the pagan people. This influenced him to be magnanimous towards his enemies, a rare thing in a pagan world.

Before his death, he was baptised and so must have accepted the full teaching of the Catholic Church, including the divinity of Christ.

Michael Brucciani, Hallaton.