Be completely empty.
Be perfectly serene.
The ten thousand things arise together;
in their arising is their return.
Now they flower,
and flowering
sink homeward,
returning to the root.
The return to the root
is peace.
Peace: to accept what must be,
to know what endures.
In that knowledge is wisdom.
You come to see that suffering is required; and you no more want to avoid it than you want to avoid putting your next foot on the ground when you are walking. In the spiritual path, joy and suffering follow one another like the two feet and you come to a point of not minding which 'foot' is on the ground. You realize on the contrary that it is extremely uncomfortable hopping all the time on the joy foot.