It takes lot of time to know a person. Take time, see the person's likes and dislikes, watch the behaviour with friends, people at home and you can know the person well. Beware, because some persons pretend to be good whereas actually, they can be very bad.
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Jab tak aap wohi dekhogi jo aapko dikhaaya jayega...tab tak aap sirf dekhti rah jaaogi....wohi dekhne ki kosis karo jo aapse chhipaya ja raha hai....agar aap dekh paayee toh samajh lo aapko insaan ka sahi pahchaan ho gaya.....