I'm not agree with that appointment and I have my reasons since, the quote in a few words tells you: don't love much until you are not sure if you correspond equally in love so that you will not be hurt in the future.
The first mistake is that it talks about not loving much until you're sure of the feelings of the other person, but why? You must love no matter if that person love you back, you should not inhibit or restrict your feelings for that absurd and doubtful thought, because ... what happen if he or she loves you in the same way or even more? You will never know the truth if you don't risk it and as he, she say over there ... if you do not risk you don't win.
Next talk about being hurt, there you are already putting limits and negativity in the relationship, because if both love each other and have a relationship you will always have the constant fear that that person could hurt you and believe me, it will never be a feeling healthy as it will torture you day by day.
We must always have a positive attitude in everything that we propose in life, you can not post a post and think that nobody is going to vote, or show your talent and think that the people will destroy you, or give a gift and think you will not like it the gift to that person ... We live always thinking about what they will say, and what will happen ... let's stop thinking about the future and focus a little more on the present, live the moment in which you feel good, live the moment in the that you are in love and you feel those butterflies in your stomach, and those nerves to see that person.
Stop thinking about the future, fear and negative things, LOVE a lot, and be HAPPY, and you will see how all the foolish fears disappear and your life begins to flow excellent !!!
Thank you for good perfective to see. Be happy with love.