Be not afraid of what will happen tomorrow.  Your future will take care of itself when you
focus upon your thoughts here and now. 
Yes, this is a common saying and ancient awareness as well, and it
contains much truth.  You are laying the
groundwork for future now-moments with your current belief system.  Every thought you have is important.  This is why it is important to be aware of
how many of your thoughts you bring with you from past now-moments which no
longer serve you.  Weed your garden with care
and leave only that which reveals the true beauty which is you.