Hsu Yun (or Xuyun) was a Chinese Chan Buddhist monk who died in 1959, allegedly at the age of 119. He travelled extensively in his life, and toward the end of his years helped to sustain the Buddhist community during the Communist revolution.

No need to chase back and forth like the waves.
The same water which ebbs is the same water that flows.
No point turning back to get water
When it’s flowing around you in all directions
The heart of the Buddha and the people of the world…
Where is there any difference?