The first is from the Streams in the Desert Devotional, the second from Matthew Henry's Commentary on Matthew 2, where Joseph is told in a dream to flee with Mary and Jesus into Egypt.
Martin Luther once said, "A true Christian will crucify, or put to death, the question, 'Why?' He will simply obey without questioning."
"This may be considered,: As a trial of faith of Joseph and Mary. They might be tempted to think, "If this child be the Son of God, as we are told he is, has he no other way to secure himself from a man that is a worm, than by such a mean and inglorious retreat as this? Cannot he summon legions of angels to be his life-guard, or cherubim with flaming swords to keep this tree of life? Cannot he strike Herod dead, or wither the hand that is stretched out against him, and so save us the trouble of this remove?" They had been lately told that he should be the glory of his people Israel; and is the land of Israel so soon become too hot for him? But we find not that they made any such objections; their faith, being tried, was found firm, they believe this is the Son of God, though they see no miracle wrought for his preservation; but they are put to the use of ordinary means."