You have to do what is .....

   You have to do what is best for you even though it may not have been what you ever wanted to do.

  You have to be able to do it alone just in case you find yourself having to do it alone. 

  You have to prepare yourself for whatever could come your way because you never know what is coming.

  You have to have a positive outlook if you have any chance for a positive outcome.

  You have to keep all your options open so you always have an option.

  You have to try because you won't know if you can do it until you try to do it.

  You only have the time you have so enjoy life while are living it.