Vex not thy spirit at the ...

Vex not thy spirit at the course of things; they heed not thy vexation.  How ludicrous and outlandish is astonishment at anything that may happen in life.
Vex not thy spirit at the course of things; they heed not thy vexation. How ludicrous and outlandish is astonishment at anything that may happen in life.

Quotes from the same author

Loss is nothing else but change, and change is Nature's delight.
He who lives in harmony with himself lives in harmony with the world.
Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth.
Everything that happens as it should, and if you observe carefully, you will find this to be so.
There is nothing happens to any person but what was in his power to go through with.