Do not push the river, it will flow by itself.

Related:

• If there is no wind, row. --
  Polish...
• Be rooted like a boulder but flow like a
  river...
• Words must be weighed, not counted. --
  Polish...
• The greatest love is a mother's, then a dog's, then a sweetheart's.
  Polish...
• Follow the river and you will find the sea.
  French...
• The greatest love is a mother's; then comes a dog's;
  then comes a sweetheart. -- Polish...
• Even a clock that does not work is right twice a day.
  Polish...
• The greater love is a mother's; then comes a dog's;
  then a sweetheart's. Polish...