Swimming and seeing big waves approaching as we swim

Swimming and seeing big waves approaching as we swim. If we focus on what we fear like drowning or have lack of swimming skills and that will make us feel the situation as dangerous. The fear and danger affect our perception.
A persons perception is escorted by their past experiences. Pass experience can affect an individuals emotions and feelings in the future. If a person gets betrayed by a friend in the past and will have trust issues to a new relationship that’s can be in the process of developing.
An Expectation can affect a persons perception. Expectation is linked with anticipation of a specific behaviour from a person. For example a technical manager expects that the non-technical individual will be oblivious about the technical features of a product.