In both the Arabic language and Islamic terminology, testimony is not limited to what is seen with one's own eyes. Rather, it means informing others about something that a person knows with certainty. The Oneness of Allah and the prophethood of Muhammad ﷺ are established through decisive rational and textual proofs. Therefore, it is correct for us to testify to both, even though we have not seen Allah or the Prophet ﷺ with our own eyes.
The answer is: No.
In its original linguistic meaning, testimony is informing others about something that one knows with certainty. It is not restricted to what a person has physically witnessed.
Allah says:
"We testify only to what we know."
(Qur'an 12:81)
This verse shows that testimony is connected to knowledge, not merely to physical sight.
Therefore, a person may testify regarding something that he knows with certainty, even if he has not personally seen it.
The scholars explained that knowledge is acquired through several means, including:
Such as recognizing the existence and Oneness of the Creator by reflecting upon the universe and Allah's signs.
Knowledge obtained through seeing, hearing, or any of the human senses.
Knowledge established through the reports of the Prophets and Messengers and through authentic, mass-transmitted reports.
We testify that there is no deity worthy of worship except Allah because decisive evidence proves His absolute Oneness, including:
These constitute certain knowledge that obligates us to testify to Allah's Oneness.
We testify that Muhammad ﷺ is Allah's Messenger because overwhelming evidence establishes the truthfulness of his mission, including:
Just as we believe in historical events that we have never witnessed because they are established through reliable, mass-transmitted reports, we believe in the prophethood of Muhammad ﷺ because of the decisive evidence proving his truthfulness.
When a Muslim says:
"I bear witness that there is no god but Allah, and I bear witness that Muhammad is the Messenger of Allah,"
he does not mean that he has physically seen Allah or the Prophet ﷺ.
Rather, he means that he possesses certain knowledge of these truths, affirms them, acknowledges them, and believes in them wholeheartedly.
For this reason, the Shahada is founded upon knowledge and certainty, not merely upon physical observation.
And Allah knows best.