Sir Muhammad Iqbal the National Poet of Pakistan says:
Imam Husayn uprooted despotism forever till the Day of Resurrection. He watered the dry garden of freedom with the surging wave of his blood, and indeed he awakened the sleeping Muslim nation. If Imam Husayn had aimed at acquiring a worldly empire, he would not have traveled the way he did (from Medina to Karbala). Husayn weltered in blood and dust for the sake of truth. Verily he, therefore, became the bed-rock (foundation) of the Muslim creed; la ilaha illa Allah (There is no god but Allah).
Ronay wala hoon Shaheed-e-Kerbala key gham men main,
Kya durey maqsad na dengey Saqiye Kausar mujhey
I am one who weeps at the plight of the Martyr of Kerbala
Won’t the reward be given to me by the Keeper of Kauser Allama Iqbal in his Baqiyat (in Urdu)
KHWAJA MOINUDDIN CHISTI (RA)says:
He gave his head, but did not put his hand into the hands of Yazid. Verily, Husayn is the foundation of la ilaha illa Allah. Husayn is lord and the lord of lords. Husayn himself is Islam and the shield of Islam. Though he gave his head (for Islam) but never pledged Yazid. Truly Husayn is the founder of “There is no Deity except Allah.”
Shah ast Hussain, Badshah ast Hussain,
Deen ast Hussain, Deen e Panah ast Hussain,
Sar dad, na dad dast, dar dast-e-yazeed,
Haqaa key binaey La ila ast Hussain
It’s Hussain the Prince, it’s Hussain the king,
He is Faith, and Faith’s Defender most daring,
He preferred death to Yazid’s allegiance,
With his blood, Islam has verily been living.