And this reproof ought to be a warning to us in the present day, that we may not call forth God’s judgment on others, while we flatter ourselves as being innocent. Whenever then we flee to God for help, and ask him to succor us, let us remember that he is a just judge who has no respect of persons. Let then every one, who implores God’s judgment, be his own judge, and anticipate the correction which he has reason to fear… let us carefully examine our own life, and follow the rule prescribed here by the Prophet. And hence it is that the Prophet adds at the end of the verse, They feared not me; for when lusts, and plunder, and frauds and the corruptions which vitiate God’s worship, prevail, it is evident that there is no fear of God, but that men, having shaken off the yoke, as it were run mad, though they may a thousand times profess the name of God. – John Calvin, Commentary on Malachi

And what, then, does all this signify? It signifies that every one, in silent inwardness before God, is to feel humility before what it means to be in the strictest sense a Christian; is to confess sincerely before God what his position is, so that he may worthily partake of the grace which is offered to every one who is not perfect, that is, to every one. And it means no more than that. For the rest let him attend to his work and find joy in it, let him love his wife, rejoicing in her, let him raise his children to be a joy to him, and let him love his fellow-men and enjoy life. God will surely let him know if more is demanded of him, and will also help him to accomplish it; for in the terrifying language of the law this sounds so terrible because it would seem as if man by his own strength were to hold fast to Christ, whereas in the language of love it is Christ that holds fast to him. As was said, then, God will surely let him know if more is demanded of him. But what is demanded of every one is that he humble himself in the presence of God under the demands of ideality. And therefore these demands should be heard, and heard again and again in all their absoluteness. – Soren Kierkegaard