If one has really technically penetrated a subject, things that previously seemed in complete contrast, might be purely mathematical transformations of each other. John von Neumann
Knowing reality means constructing systems of transformations that correspond, more or less adequately, to reality. Jean Piaget
The relations that define a system as a unity, and determine the dynamics of interaction and transformations which it may undergo as such a unity constitute the organization of the machine. Francisco Varela
If man reflects on the changes and transformations which follow one another like wave after wave and their rapidity, he will despise everything which is perishable. Marcus Aurelius
A work is never completed except by some accident such as weariness, satisfaction, the need to deliver, or death: for, in relation to who or what is making it, it can only be one stage in a series of inner transformations. Paul Valéry
But I must finally realize that I am subject to these sudden transformations. The thing is that I rarely think; a crowd of small metamorphoses accumulate in me without my noticing it, and then, one fine day, a vertiable revolution takes place. Jean-Paul Sartre