The scariest thing in life is not knowing what you want. Even if you do know what you want to do, the existance of the uncertainty on whether or not it will bring you happiness will still be there. However, do not use guilt as a cause to avoid responsibility. Your happiness is important because through it, you can help people effectively. However, in order to realise the true meaning of happiness, you must first realise what sadness is. Through sadness, you will find happiness.