He spake unto them in the cloudy pillar - He spake to the men of other times; to those who called upon his name. It cannot be meant literally that he spake to “Samuel” from the “cloudy pillar” - the pillar which guided the Israelites in the wilderness, unless that term be understood in the general sense as denoting the “Shechinah” - the visible symbol of the divine presence - the cloud that rested on the ark. The idea is, that God his people in ancient times from the cloud - the symbol of his presence; that he communed with them; that he heard their prayers; that he gave them his commandments; that he interposed in their behalf, and that it was not a vain thing that they worshipped him. All this was as true of Samuel - it is as true now of those who call upon God - as it was of Moses and Aaron.
They kept his testimonies ... - They obeyed his laws, and he thus heard and answered them.