In my final thesis I research the functioning of the human mental space and its transmission into a man's expression and I study this process through acting and directing of the former exam productions. Mental space and expression are temporal products of form and content processing in time. The only thing that is identical in thought and expression is the rhythmic pattern. It is accomplished by joining several time lines in the seemingly one information we get in the expression. The rhythmic pattern in itself does not carry the content and form but is the product of the relationship between the two. In acting and directing this process is often a reverse transmission. The audience sees rhythmically processed material already grouped into macro situations - rhythmic sections and rhythmic sequences. However, during rehearsals we research in a reversed sequence how the actor's mental space expands in a way that would give the exact rhythmic pattern in an expression. Rhythm is the unique thing in itself in a performance, it is without negation so we can acquire an attitude towards it. We can not be unadapted to the rhythm, regardless of whether the rhythm has been consciously or unconsciously received.