If you keep your focus on the external world and pay no attention to your internal world, suffering will ensue.  It can be no other way, for in the physical world, what goes up also goes down.  And if things do not go down, then you cling to the ups and do everything you can to find more and more and more of the good feelings.  This is called addiction.  Beneath addiction lies an undercurrent of suffering.  If this sounds dismal, worry not.  There is an alternative that does not include ups and downs.  Can you imagine a steady state of contentment?  This is known as joy.  This is known as peace.  This is what ensues when you agree to take your focus off of the external world and seek within.  Within what?  Not the physical body.  Within Consciousness … Awareness.  It is even beyond the mind.  The mind is the activity of Consciousness, which is your true essence.  Awareness lies beyond and beneath all as one sea of infinite potential.  Go beneath the waves.  Dive in and find the stillness.  You will not cease breathing, for you are not the one doing the breathing.  Find the One who breathes you and the end of suffering will come into view.