Even though you may think (and often do) know your partner very well, you may not do a good job of reading him or her. When you operate from what you “know” he or she is thinking, you may be wrong. In fact, you may be very, very wrong.
Rather than telling your partner that you know what they are thinking or feeling, phrase it as a question and be open to the idea that you may be all wrong.
Give your partner the benefit of the doubt.