You must not allow yourselves to be ruled by your likes and dislikes, but learn instead to use them. When you have a liking for someone, think of them so that you are filled with joy and renewed courage.
Yes, someone you like has a positive influence on you, so take advantage of the good frame of mind they put you in.
You will say, ‘And what about someone I dislike?’ Well, in that case, practise, say to yourself, ‘The two of us must now overcome this’.
Try it, and you will see how much stronger and more powerful you will become. Yes, there are always all kinds of opportunities to become stronger.
Why do you not use them? You stick to your feelings of sympathy or antipathy but that is not good enough. You need to know that these impulses do not arise within you for you to surrender to, but for you to use intelligently to further your evolution.