1 Samuel 3:15 - Matthew Poole's English Annotations on the Holy Bible

Opened the doors of the house of the Lord: although the tabernacle, whilst it was to be removed from place to place in the wilderness, had no doors, but consisted only of curtains, and had only hangings before the entrance, instead of doors; yet when it was settled in one place, as now it was in Shiloh, where it had been for a long time, it is more than probable, both from this place, and by comparing 1 Samuel 1:9 2 Samuel 6:17, and from the nature and reason of the thing, that it was enclosed within some solid building, which had doors, and posts, and other parts belonging to it. The vision, i.e. the matter of the vision or revelation, partly from the reverence and respect he bore to his person, to whom he was loth to be a messenger of such sad tidings; partly lest if he had been hasty to utter it, Eli might think him guilty of arrogancy or secret complacency in his calamity, which was like to tend to Samuel's advancement. And not being commanded by God to acquaint Eli herewith, he prudently suspended the publication of it till a fit occasion were offered, which he might reasonably expect in a very little time, knowing that Eli would be greedy to know the matter of that revelation, the preface whereof he was acquainted with; and that it would be less offensive, and therefore more useful to Eli, when he saw that Samuel was not puffed up with it, nor forward to vent it, until Eli forced it from him.