"Que sera, sera,
Whatever will be, will be;
The future's not ours to see.
Que sera, sera,
What will be, will be.
Que Sera, Sera!"
"Que sera, sera" , is a song from a Hitchcock film, The Man Who Knew Too Much (1956), and it means, "whatever will be will be". The next line describes what the songwriter means by that and it is that, "the future's not ours to see". A friend of mine was recently saying over and over, "I don't know what's going to happen". He was stating the obvious.
We really don't know what's going to happen with many things that are out of our hands. Jesus said don't worry about tomorrow because today has enough going on already. "Sufficient unto the day is the evil thereof". Stay in the present.
Planning for the future is another matter. The message of this song is not to be passive about the future, but to not worry about it. You are being right now in your present. The present is now. Right now you can do things that will affect your future. You can plan ahead. But it will be in the future. I don't know what the future holds, but I know who holds the future.