There is a sentence "I am what I do" by Martin Buber, but is there such a sentence as "I do what I am"?
Do both sentences mean the same or is there a difference?
It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.
Those sentences are not the same.
"I am what I do" means that my personality is determined/can be described by my actions. "I do what I am" means that my actions are determined/can be described by my personality.
Technical speaking, the difference is what is a cause and what is an effect (philosophical concept of casuality). In the first sentence "I" is an effect of my action — "I do". In the second my actions "I do" is an effect of what "I am".
And is there such a phrase? Don't think that it exists in exactly those words. Some of our prominent philosophers, Freud among them, do postulate this same principle though.