Chris McDonnell’s assertion (“One man, two vocations”, 19 July) “we do not see the Sacrament of Marriage conflicting in any way with the ministry of the priest” cannot be allowed to go unchallenged. It is one thing to experience a vocation of any kind. It is quite another to fulfil the commitment involved in living it. In matrimony, my wife and I are called and challenged – in all our personal frailty – to live a lifetime of exclusive and unconditional love in and for the Church and the world (Daniel O’Leary touches on this in his article, “Let us love one another”, 19 July). We are called to be the sacrament into which we were initiated at our wedding. Likewise, at his ordination, the priest is called to a lifetime of exclusive