Wherefore the king said unto me, Why is thy countenance sad, seeing thou art not sick? this is nothing else but sorrow of heart. Then I was very sore afraid,

Wesley's Notes

2:2 Sad - His fasting joined with inward grief had made a sensible change in his countenance. Afraid - It was an unusual and ungrateful thing to come into the king of Persia's presence with any token of sorrow. And he feared a disappointment, because his request was great and invidious, and odious to most of the Persian courtiers.

Jamieson-Fausset-Brown Bible Commentary

2-5. the king said unto me, Why is thy countenance sad?-It was deemed highly unbecoming to appear in the royal presence with any weeds or signs of sorrow (Es 4:2); and hence it was no wonder that the king was struck with the dejected air of his cupbearer, while that attendant, on his part, felt his agitation increased by his deep anxiety about the issue of the conversation so abruptly begun. But the piety and intense earnestness of the man immediately restored [Nehemiah] to calm self-possession and enabled him to communicate, first, the cause of his sadness (Ne 2:3), and next, the patriotic wish of his heart to be the honored instrument of reviving the ancient glory of the city of his fathers.

Matthew Henry's Concise Commentary

2:1-8 Our prayers must be seconded with serious endeavours, else we mock God. We are not limited to certain moments in our addresses to the King of kings, but have liberty to go to him at all times; approaches to the throne of grace are never out of season. But the sense of God's displeasure and the afflictions of his people, are causes of sorrow to the children of God, under which no earthly delights can comfort. The king encouraged Nehemiah to tell his mind. This gave him boldness to speak; much more may the invitation Christ has given us to pray, and the promise that we shall speed, encourage us to come boldly to the throne of grace. Nehemiah prayed to the God of heaven, as infinitely above even this mighty monarch. He lifted up his heart to that God who understands the language of the heart. Nor should we ever engage in any pursuit in which it would be wrong for us thus to seek and expect the Divine direction, assistance, and blessing. There was an immediate answer to his prayer; for the seed of Jacob never sought the God of Jacob in vain.