be in harmony

See: conform
References in classic literature ?
But on the following Friday he was waited upon by the Pillars of the Church, who informed him that in order to be in harmony with the New Theology and get full advantage of modern methods of Gospel interpretation they had deemed it advisable to make a change.
To be good is to be in harmony with one's self," he replied, touching the thin stem of his glass with his pale, fine-pointed fingers.