A crude translation in English follows after the original.

The True Message
Wake up Islam! Wake up Muslim! Allah is your only Lord, the Qur'an is the sublime and supreme message of that faith. Truth is your garment; egalitarianism, harmony and freedom are your goals. Wake up! . . .
You are brave. Who makes you forget your message of eternal salvation, perennial freedom and liberty? You have abounding power, indomitable spirit: who puts sword through your chest? Islam is not the religion of slumber; Muslims are not a people that bow head to others. . . .
Do you remember that blood-decorated flag that was waving at the gates of world's lions - that spirit and strength that shook up the world? Tell us the valiant: where is that power and strength of yours today? Tell us the scared ones: who subjugated that great and bold power? Answer! I call upon you in the name of Allah: answer! No one was able to humiliate you; Islam never condoned such humiliation. You are the truth; Islam is the truth; humiliation of you-me or ISLAM is humiliation of the truth? Anyone who yields to this is coward, small! The day you forgot the your sublime and supreme motto and you started walking under the shadow of subjugation, instead of freedom and independence, from that very day your head was struck by the weapons of the falsehood and the enemy. Islam does not lower its head before anyone except Allah. . . .
Even if you lose everything, even if you don't have a roof over your head, don't bother, but never lower your head! Then, you will regain everything. Muslims are low-spirited: even before you hear this despicable suggestion, it is better that you pour hot-melted iron in your ears and become deaf! . . .
[These are excerpts from a prose of Nazrul "Shottyo Bani" (The True Message), which was published in 1921 in Shadhona, the same year Bidrohi was published.
Nazrul Rochonaboli, Vol. 4, pp. 36-37, 1996 ed., Bangla Academy]