There will always be people who will try to divert you from your dream. They will try to make your talents or your abilities feel inadequate. These people might be absolute strangers or they might be really close relatives/friends, who in their own respect, have your best interests in mind. Instead of getting angry at them or getting discouraged by them feel lucky because it is the negativity of these people that will help fuel the passion you have in your dream. Its their pessimism that will help build your belief in yourself. Its their attitude towards your dreams that will strengthen your resolve to prove them wrong.
If you give up when they say its not your cup of tea, you basically let them win and stay as someone who could never cross the finish line. Instead smile at them when they lecture you on how ludicrous your dream seems, and wish them the best in their life’s endeavours. And when they aren’t looking, work on your dream and cross that finish line. When you have accomplished what you had set out for and when your ideas start taking shape, send the people who discouraged you a thank you card. Because if it wasn’t for your will to prove these people wrong you would have probably given up eons ago.