There will always be people who say that we can´t, weather they are unknowingly projecting their insecurities and fears on to us or more complex reasons. Nonetheless, it is in ourselves to make the decision to allow their words to stop us or to follow our dreams till the end.
Of course there are obstacles and difficulties in life, but it is only when we accept that these are impassable unless we get lucky (win the lottery, being discovered, etc) that they actually become impassable walls.
Hardships, problems, tragedies and anything that might happen in our lives, we are still the only ones responsible for that life, and the only ones who can do something to make it better or to stay in the same place blaming circumstance and others.
La felicidad podemos entenderla como algo que sucede repentinamente, dependiente del chance y de la suerte. O puede ser algo que construimos y desarrollamos, algo que llevamos dentro sin importar que suceda a nuestro alrededor.