There is always something that goes on in the mind
Sometimes something goes on at the back of mind
Sometimes something goes on in the mind with the present moment in time.
There is always something that goes on in the mind.

Engaged is the mind
Engaged in thoughts of own
Occupied with thoughts of own.

Examining the present and ascertaining the future remains a part of life, since there is always something that goes on in the mind.

Sometimes knowingly
Sometimes unknowingly
There is always something that goes on in the mind.

Whatever that something might be
One thing one must always remain sure of
One must always think positively
One must remain in a positive frame of mind irrespective of the past, present and even when it comes to dealing with an uncertain future.

There is always something that goes on in the mind, but then let that something be a positive thing in your life.