Imam Ahmed Alhasan احمد الحسن a.s said قال الامام احمد الحسن ع
I came to testify for the truth and to say the truthجئت لأشهد للحق وأقول الحق
It is why I was born and it is what I will die upon, if Allah willsولدت لهذا ، وسأموت على هذا إن شاء الله
As for you, if you want to testify for the truth, testify. But if you find its bitterness and heaviness, praise Allah for what He has bestowed upon you, as the truth is heavy and bitter, and falsehood is light and sweet.
And know that your message is the message of all the prophets and successors pbut, so work and be witnesses over the people, just as the messenger is a witness over you. And Allah, His Messenger, the prophets, and successors pbut and the believers will see your work. And have patience, and hang on to your religion and unite with each other. Debate the people of the book by their book, and the people of the Gospel by their Gospel, because your cause is mentioned in their Gospel not generally, but in detail.
From the book: The letter of guidance من كتاب رسالة الهداية
The Letter of Guidance