The Muslim king will not be able to establish the honour of theism (tauhid) and the supremacy of the Islam unless he strives with all his courage to … - Ziauddin Barani

Ziauddin Barani [Diyā al-Dīn Baranī: 1285-1357] who was an Indian jurist, historian, political thinker, writer, and a companion of Sultan Muhammad b. Tughluq [1309 –1388], wrote a Fürstenspiegel, a Mirror of Princes, akin to Machiavelli’s The Prince, the Fatāwā-yi Djahāndārī, in order to educate the de facto rulers of the day, the sultans, in their duty towards Islam in an age of corruption. Barani advises sultans to enforce the sharī‘a, to curb unorthodoxy ( especially speculative philosophy, falsafa), to degrade the infidel, who must be treated harshly. The Sultans must fight like the Prophet until all people affirm that “there is no God but Allah.” It is the duty of Muslim rulers to overthrow infidelity, uproot it completely, and apply the Holy Law, the Sharia on all.

'Alpau-d dín was a king who had no acquaintace with learning, and never associated with the learned. When he became king, he came to the conclusion that polity and government are one thing, and the rules and decrees of law are another. Royal commands belong to the king, legal decrees rest upon the Judgment of kázis and mufis. In accordance with this opinion, whatever affair of state came before him, he only looked to the public good, without considering whether his mode of dealing with it was lawful or unlawful. He never asked for legal opinons about poitical matters, and very few learned men visited him. Kázi Mughpisu-d dín, of Bayánah, used to go to court and sit down in private audience with the amirs. Once day, when the efforts were being made for the increase of the tribute and of the fines and imposts, the Sultán told the Kazi that he had several questions to ask him, and desired him to speak the plain truth. The Kazi replied, "The angel of my destiny seems to be close at hand, since your Majesty wishes to question me on matters of religion; if I sepak the truth you will be angry and kill me." The Sulpan said he would not kill him and commanded him to answer his questions truly and candidly. The Kazi then promised to answer in accordance with what he had read in books.... The Sultán smiled at this answer of the Kazi's, and said, "I do not understand any of the statements thou hast made; but this I have discovered, that the khuts and mukaddims ride upon fine horses, wear fine clothes, shoot with Persian bows, make war upon each other, and go out hunting; but of the kharaj (tribute), jizya (poll tax), kari (house tax), and chari (pasture tax), they do not pay one jital. They levy separately the Khut's (landowner's) share from the villages, give parties and drink wine, and many of them pay no revenue at all, either upon demand or without demand. Neither do they show any respect for my officers.

[What worried him most was that the Indian Muslims were appointed to] “high offices and are successful in their work… they will make people of their own kind their helpers, supporters, colleagues. They will not allow (Turkish) nobles and free-born men and men of merits to come anywhere near the affairs of the government.”