unpredictable - understanding - application

Life is always unpredictable and you will never know what's the next step gonna to be..

I always try to make sure each step I take will be alright,
I can always plan the next step,
however,
I cant control the step after one step taken...
just because..............
It is unpredictable!

I know it is unpredictable and I shouldn;t wasting my time thinking on things that not yet happen or soon to happen,
yet, understanding is there, what about application?