It was the personal side which Our Lord stressed by referring to God, as he so often did, as “your Heavenly Father”.  The Apostles spent three years in the closest association with Our Lord and in that time they discovered that he was completely different from anyone else they had ever known or heard about.  There was his perfect manner of life, his lack of any personal sin, his assumption of absolute authority over the souls of human beings, his power over the forces of Nature, his repeated statement that at the end of the world it was he who would judge the whole human race, and finally his Resurrection – these factors and others besides led the Apostles to the only conclusion which fitted the facts, that he was, as St Thomas put it, their Lord and their God.  On the other hand, they were equally aware that he was distinct from God the Father who had sent him and whom he spoke of as being in a special sense, “My Father”.