In this research, using an analytical-descriptive method, we have studied the deliberate silences of Imam Ali, which were influenced by political, social, cultural, and other factors. In social interactions between individuals, sometimes the lack of explicitness in expressing a topic by the speaker acts as a silence and as an unnatural sign in the discourse. Denis Corzon categorizes this type of silence into four branches: conversational silence, thematic or content silence, textual silence, and situational silence. Thematic silence refers to a silence where, for various reasons, a topic is concealed in speech, and this is often observed more frequently in political speeches. Another part of this silence has a linguistic aspect, which has led to a kind of brevity in speech and an emphasis on important matters. Ali, son of Abi Taleb, as a masterful orator and wise leader, has left certain topics unsaid in his sermons, letters, and wisdom literature. We have examined a limited number of these cases. The aim of this research is to investigate the Imam’s intentions in concealing topics or approximating his language to the language of the common people of his time.. The achievement of the present research is that their thematic silences have been expressed in the form of brevity, simile and metaphor, allegory, allusions, and Arabic symbols to address important issues while preserving the unity of the Islamic community And in some cases, harmony with common customs and language has been demonstrated.