If you are a person, you have a personality - a specific, unique kind of personality, in fact. God gave you a unique personality even as He gave you DNA with specific instructions for your own unique fingerprints, voice prints, hair follicles, eye color, skin color, shoe size, etc. All of these can be scientifically measured and you can be identified by them.
Science is good when it measures and reports the truth.
A profile can now be made of a criminal and future activity predicted based upon what he has done - because personality shows how we are apt to think and to act. This pertains to use of personality, too. One psychometric inventory that has gained in validity and in popularity in finding out your personality based on type classification is the Myers-Briggs Type Indicator. Personality is also dynamically able to grow, to expand us - releasing talents and gifts that may have even been hidden from our view. We are, however, told to work out our own salvation .