The idea of knowing someone is "the one" upon first sight is often portrayed in romantic movies and novels, but in reality, it's not a universal experience and tends to be more of a romanticized notion than a common occurrence. People's experiences with love and attraction vary greatly, and there is no one-size-fits-all answer to this question.
While some individuals may feel an intense and immediate connection with someone they've just met, others might take time to develop feelings and deeper emotions for someone. Love and attraction can be complex, and they often involve factors beyond initial physical appearance, such as shared interests, values, personality, and emotional connection.
For many people, feelings of love and certainty about a potential partner tend to grow and evolve over time as they get to know the person better. It's not uncommon for strong relationships to begin with initial attraction but deepen and solidify as the individuals spend more time together and learn more about each other.
In short, while some people may believe in love at first sight or feeling that someone is "the one" upon the first meeting, it's not a universal experience. Love and attraction can take different paths for different individuals, and what matters most is the genuine connection and compatibility between the two people involved.