“Everything is impermanent. Every physical and mental experience arises and passes. Everything in existence is endlessly arising out of causes and conditions. We all create suffering for ourselves through our resistance, through our desire to have things different than the way they are - that is, our clinging or aversion.”

Source: Manual of Insight (1945), pp. 66-67

Source: Veronika Decides to Die

Introduction I. Of the Difference Between Pure and Empirical Knowledge
Critique of Pure Reason (1781; 1787)
Variant: That all our knowledge begins with experience there can be no doubt.
Context: That all our knowledge begins with experience there can be no doubt. For how is it possible that the faculty of cognition should be awakened into exercise otherwise than by means of objects which affect our senses, and partly of them selves produce representations, partly rouse our powers of understanding into activity, to compare, to connect, or to separate these, and so to convert the raw material of our sensuous impressions into a knowledge of objects, which is called experience? In respect of time, therefore, no knowledge of ours is antecedent to experience, but begins with it. But though all our knowledge begins with experience, it by no means follows, that all arises out of experience. For, on the contrary, it is quite possible that our empirical knowledge is a compound of that which we receive through impressions, and that which the faculty of cognition supplies from itself (sensuous impressions giving merely the occasion)... It is, therefore, a question which requires close investigation, and is not to be answered at first sight,—whether there exists a knowledge altogether independent of experience, and even of all sensuous impressions? Knowledge of this kind is called à priori, in contradistinction to empirical knowledge which has its sources à posteriori, that is, in experience.

The Heart of the Revolution (2011)

Si nous résistons à nos passions, c'est plus par leur faiblesse que par notre force.
If we conquer our passions, it is more from their weakness than from our strength.
Maxim 122.
Reflections; or Sentences and Moral Maxims (1665–1678)

Source: Nationalism and Culture (1937), Ch. 1 "The Insufficiency of Economic Materialism"
Context: Every process which arises from our physical being and is related to it, is an event which lies outside of our volition. Every social process, however, arises from human intentions and human goal setting and occurs within the limits of our volition. Consequently, it is not subject to the concept of natural necessity. … We are here stating no prejudiced opinion, but merely an established fact. Every result of human purposiveness is of indisputable importance for man's social existence, but we should stop regarding social processes as deterministic manifestations of a necessary course of events. Such a view can only lead to the most erroneous conclusions and contribute to a fatal confusion in our understanding of historical events.
It is doubtless the task of the historian to trace the inner connection of historical events and to make clear their causes and effects, but he must not forget that these connections are of a sort quite different from those of natural physical events and must therefore have quite a different valuation.

Todo lo que nos sucede, todo lo que hablamos o nos es relatado, cuanto vemos con nuestros propios ojos o sale de nuestra lengua o entra por nuestros oídos, todo aquello a lo que asistimos (y de lo cual, por tanto, somos algo responsables), ha de tener un destinatario fuera de nosotros mismos, y a ese destinatario lo vamos seleccionando en función de lo que acontece o nos dicen o bien decimos nosotros.
Source: Todas las Almas [All Souls] (1989), p. 140

Variant: Don't cling to things because everything is impermanent.
Source: Tuesdays with Morrie