This quote, "I distrust the incommunicable; it is the source of all violence," signifies the belief that lack of communication or the inability to express oneself can lead to misunderstanding, conflict, and ultimately, violence. The term "incommunicable" refers to something that cannot be communicated, shared, or understood by others. Sartre is likely referring to emotions, thoughts, or experiences that are so personal or complex that they resist easy explanation or understanding.

When we are unable to effectively communicate or understand our own or others’ thoughts and feelings, it can create a sense of isolation or alienation. This can result in frustration, anger, and potentially violence, as people may resort to physical force when they feel unheard or misunderstood.

In today’s world, this quote is particularly relevant, as we live in a global society where people of different cultures, languages, and belief systems are constantly interacting. Misunderstandings and conflicts often arise due to lack of communication or inability to understand each other’s perspectives. This can lead to tension, hostility, and even violence on both a personal and societal level.

In terms of personal development, this quote emphasizes the importance of effective communication and empathy. To mitigate the risk of misunderstanding and conflict, we should strive to express our thoughts and feelings clearly and honestly, while also making an effort to understand and validate others’ perspectives. This involves not only speaking effectively, but also listening actively and empathetically. By doing so, we can foster mutual understanding, respect, and peace, both in our personal relationships and in the larger society.