Psychedelics can indeed alter our perception of self and the world around us, leading to a shift in our conscious experience. They can create an experience of altered internal and external perception, and even alter our relationship with space and time. This can lead to lasting learning and potentially changes in how we perceive our identity. However, it's important to note that these substances are not without their risks and should be used safely, responsibly, and ideally under clinical or other types of guidance. As Sam Harris pointed out, there are many different types of substances under the umbrella term "psychedelics", and they're not all the same. So, the impact on identity can vary depending on the substance used.