B ecause of the wide shade of meaning of the word sidq ...
B ecause of the wide shade of meaning of the word sidq , that is, it is not associated only with discourse but extends to thought, morality, and behaviour, and since according to the Qur’anic verse it is obligatory to be with the truthful, the phrase to “be with the truthful” does not mean to be physically with the truthful, but to abide by all the things implied by truth and correctness.
By sadiqin (the truthful) it is meant those who possess absolute truth, not mere truth and a truthful person, in its absolute sense, is the one who is true (and sincere) in all aspects – one whose way of thinking, his word, his conduct and his disposition, know no crookedness and deviation. Such a person is none other than the infallible one, the ( m’asum ) . Being with such a person means following him and complying with his way of thinking, his actions and his conduct.